Removed some more commented-out code from mvlmm.cpp.

1 files changed, 1037 insertions, 928 deletions

diff --git a/src/mvlmm.cpp b/src/mvlmm.cpp
index 5eb7e38..78cd926 100644
--- a/src/mvlmm.cpp
+++ b/src/mvlmm.cpp
@@ -3403,7 +3403,7 @@ void MVLMM::Analyzebgen (const gsl_matrix *U, const gsl_vector *eval,
 	      
 	      time_start=clock();
 		    
-	      // 3 is before 1
+	      // 3 is before 1.
 	      if (a_mode==3 || a_mode==4) {
 		p_score=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y,
 				  V_g_null, V_e_null, UltVehiY, beta, Vbeta);
@@ -3565,10 +3565,15 @@ void MVLMM::AnalyzeBimbam (const gsl_matrix *U, const gsl_vector *eval,
 	gsl_matrix *UltVehiU=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *UltVehiE=gsl_matrix_alloc (d_size, n_size);
 
-	//large matrices for NR
-	gsl_matrix *Hi_all=gsl_matrix_alloc (d_size, d_size*n_size);		//each dxd block is H_k^{-1}
-	gsl_matrix *Hiy_all=gsl_matrix_alloc (d_size, n_size);				//each column is H_k^{-1}y_k
-	gsl_matrix *xHi_all=gsl_matrix_alloc (dc_size, d_size*n_size);		//each dcxdc block is x_k\otimes H_k^{-1}
+	// Large matrices for NR.
+	// Each dxd block is H_k^{-1}.
+	gsl_matrix *Hi_all=gsl_matrix_alloc (d_size, d_size*n_size);
+
+	// Each column is H_k^{-1}y_k.
+	gsl_matrix *Hiy_all=gsl_matrix_alloc (d_size, n_size);
+
+	// Each dcxdc block is x_k \otimes H_k^{-1}.
+	gsl_matrix *xHi_all=gsl_matrix_alloc (dc_size, d_size*n_size);
 	gsl_matrix *Hessian=gsl_matrix_alloc (v_size*2, v_size*2);
 
 	gsl_vector *x=gsl_vector_alloc (n_size);
@@ -3582,7 +3587,7 @@ void MVLMM::AnalyzeBimbam (const gsl_matrix *U, const gsl_vector *eval,
 	gsl_vector *beta=gsl_vector_alloc (d_size);
 	gsl_matrix *Vbeta=gsl_matrix_alloc (d_size, d_size);
 
-	//null estimates for initial values
+	// Null estimates for initial values.
 	gsl_matrix *V_g_null=gsl_matrix_alloc (d_size, d_size);
 	gsl_matrix *V_e_null=gsl_matrix_alloc (d_size, d_size);
 	gsl_matrix *B_null=gsl_matrix_alloc (d_size, c_size+1);
@@ -3590,7 +3595,8 @@ void MVLMM::AnalyzeBimbam (const gsl_matrix *U, const gsl_vector *eval,
 
 	gsl_matrix_view X_sub=gsl_matrix_submatrix (X, 0, 0, c_size, n_size);
 	gsl_matrix_view B_sub=gsl_matrix_submatrix (B, 0, 0, d_size, c_size);
-	gsl_matrix_view xHi_all_sub=gsl_matrix_submatrix (xHi_all, 0, 0, d_size*c_size, d_size*n_size);
+	gsl_matrix_view xHi_all_sub =
+	  gsl_matrix_submatrix (xHi_all, 0, 0, d_size*c_size, d_size*n_size);
 
 	gsl_matrix_transpose_memcpy (Y, UtY);
 
@@ -3601,30 +3607,37 @@ void MVLMM::AnalyzeBimbam (const gsl_matrix *U, const gsl_vector *eval,
 	gsl_vector_view B_col=gsl_matrix_column(B, c_size);
 	gsl_vector_set_zero(&B_col.vector);
 
-	MphInitial(em_iter, em_prec, nr_iter, nr_prec, eval, &X_sub.matrix, Y, l_min, l_max, n_region, V_g, V_e, &B_sub.matrix);
-	logl_H0=MphEM ('R', em_iter, em_prec, eval, &X_sub.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub.matrix);
-	logl_H0=MphNR ('R', nr_iter, nr_prec, eval, &X_sub.matrix, Y, Hi_all, &xHi_all_sub.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-	MphCalcBeta (eval, &X_sub.matrix, Y, V_g, V_e, UltVehiY, &B_sub.matrix, se_B_null);
+	MphInitial(em_iter, em_prec, nr_iter, nr_prec, eval, &X_sub.matrix,
+		   Y, l_min, l_max, n_region, V_g, V_e, &B_sub.matrix);
+	logl_H0=MphEM ('R', em_iter, em_prec, eval, &X_sub.matrix, Y, U_hat,
+		       E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU,
+		       UltVehiE, V_g, V_e, &B_sub.matrix);
+	logl_H0=MphNR ('R', nr_iter, nr_prec, eval, &X_sub.matrix, Y, Hi_all,
+		       &xHi_all_sub.matrix, Hiy_all, V_g, V_e, Hessian,
+		       crt_a, crt_b, crt_c);
+	MphCalcBeta (eval, &X_sub.matrix, Y, V_g, V_e, UltVehiY,
+		     &B_sub.matrix, se_B_null);
 
 	c=0;
 	Vg_remle_null.clear();
 	Ve_remle_null.clear();
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			Vg_remle_null.push_back(gsl_matrix_get (V_g, i, j) );
-			Ve_remle_null.push_back(gsl_matrix_get (V_e, i, j) );
-			VVg_remle_null.push_back(gsl_matrix_get (Hessian, c, c) );
-			VVe_remle_null.push_back(gsl_matrix_get (Hessian, c+v_size, c+v_size) );
-			c++;
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    Vg_remle_null.push_back(gsl_matrix_get (V_g, i, j) );
+	    Ve_remle_null.push_back(gsl_matrix_get (V_e, i, j) );
+	    VVg_remle_null.push_back(gsl_matrix_get (Hessian, c, c) );
+	    VVe_remle_null.push_back(gsl_matrix_get (Hessian, c+v_size,
+						     c+v_size) );
+	    c++;
+	  }
 	}
 	beta_remle_null.clear();
 	se_beta_remle_null.clear();
 	for (size_t i=0; i<se_B_null->size1; i++) {
-		for (size_t j=0; j<se_B_null->size2; j++) {
-			beta_remle_null.push_back(gsl_matrix_get(B, i, j) );
-			se_beta_remle_null.push_back(gsl_matrix_get(se_B_null, i, j) );
-		}
+	  for (size_t j=0; j<se_B_null->size2; j++) {
+	    beta_remle_null.push_back(gsl_matrix_get(B, i, j) );
+	    se_beta_remle_null.push_back(gsl_matrix_get(se_B_null, i, j) );
+	  }
 	}
 	logl_remle_H0=logl_H0;
 
@@ -3633,258 +3646,273 @@ void MVLMM::AnalyzeBimbam (const gsl_matrix *U, const gsl_vector *eval,
 
 	cout<<"REMLE estimate for Vg in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_g, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_g, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Vg): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"REMLE estimate for Ve in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_e, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_e, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Ve): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"REMLE likelihood = "<<logl_H0<<endl;
 
-
-	logl_H0=MphEM ('L', em_iter, em_prec, eval, &X_sub.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub.matrix);
-	logl_H0=MphNR ('L', nr_iter, nr_prec, eval, &X_sub.matrix, Y, Hi_all, &xHi_all_sub.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-	MphCalcBeta (eval, &X_sub.matrix, Y, V_g, V_e, UltVehiY, &B_sub.matrix, se_B_null);
+	logl_H0=MphEM ('L', em_iter, em_prec, eval, &X_sub.matrix, Y, U_hat,
+		       E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU,
+		       UltVehiE, V_g, V_e, &B_sub.matrix);
+	logl_H0=MphNR ('L', nr_iter, nr_prec, eval, &X_sub.matrix, Y,
+		       Hi_all, &xHi_all_sub.matrix, Hiy_all, V_g, V_e,
+		       Hessian, crt_a, crt_b, crt_c);
+	MphCalcBeta (eval, &X_sub.matrix, Y, V_g, V_e, UltVehiY,
+		     &B_sub.matrix, se_B_null);
 
 	c=0;
 	Vg_mle_null.clear();
 	Ve_mle_null.clear();
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			Vg_mle_null.push_back(gsl_matrix_get (V_g, i, j) );
-			Ve_mle_null.push_back(gsl_matrix_get (V_e, i, j) );
-			VVg_mle_null.push_back(gsl_matrix_get (Hessian, c, c) );
-			VVe_mle_null.push_back(gsl_matrix_get (Hessian, c+v_size, c+v_size) );
-			c++;
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    Vg_mle_null.push_back(gsl_matrix_get (V_g, i, j) );
+	    Ve_mle_null.push_back(gsl_matrix_get (V_e, i, j) );
+	    VVg_mle_null.push_back(gsl_matrix_get (Hessian, c, c) );
+	    VVe_mle_null.push_back(gsl_matrix_get(Hessian,c+v_size,c+v_size));
+	    c++;
+	  }
 	}
 	beta_mle_null.clear();
 	se_beta_mle_null.clear();
 	for (size_t i=0; i<se_B_null->size1; i++) {
-		for (size_t j=0; j<se_B_null->size2; j++) {
-			beta_mle_null.push_back(gsl_matrix_get(B, i, j) );
-			se_beta_mle_null.push_back(gsl_matrix_get(se_B_null, i, j) );
-		}
+	  for (size_t j=0; j<se_B_null->size2; j++) {
+	    beta_mle_null.push_back(gsl_matrix_get(B, i, j) );
+	    se_beta_mle_null.push_back(gsl_matrix_get(se_B_null, i, j) );
+	  }
 	}
 	logl_mle_H0=logl_H0;
 
 	cout<<"MLE estimate for Vg in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_g, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_g, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Vg): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"MLE estimate for Ve in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_e, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_e, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Ve): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"MLE likelihood = "<<logl_H0<<endl;
 
-
 	vector<double> v_beta, v_Vg, v_Ve, v_Vbeta;
 	for (size_t i=0; i<d_size; i++) {
-		v_beta.push_back(0.0);
+	  v_beta.push_back(0.0);
 	}
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			v_Vg.push_back(0.0);
-			v_Ve.push_back(0.0);
-			v_Vbeta.push_back(0.0);
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    v_Vg.push_back(0.0);
+	    v_Ve.push_back(0.0);
+	    v_Vbeta.push_back(0.0);
+	  }
 	}
 
 	gsl_matrix_memcpy (V_g_null, V_g);
 	gsl_matrix_memcpy (V_e_null, V_e);
 	gsl_matrix_memcpy (B_null, B);
 
-	//start reading genotypes and analyze
+	// Start reading genotypes and analyze.
 	size_t csnp=0, t_last=0;
 	for (size_t t=0; t<indicator_snp.size(); ++t) {
 	  if (indicator_snp[t]==0) {continue;}
 	  t_last++;
 	}
 	for (size_t t=0; t<indicator_snp.size(); ++t) {
-		//if (t>=1) {break;}
-		!safeGetline(infile, line).eof();
-		if (t%d_pace==0 || t==(ns_total-1)) {ProgressBar ("Reading SNPs  ", t, ns_total-1);}
-		if (indicator_snp[t]==0) {continue;}
-
-		ch_ptr=strtok ((char *)line.c_str(), " , \t");
-		ch_ptr=strtok (NULL, " , \t");
-		ch_ptr=strtok (NULL, " , \t");
-
-		x_mean=0.0; c_phen=0; n_miss=0;
-		gsl_vector_set_zero(x_miss);
-		for (size_t i=0; i<ni_total; ++i) {
-			ch_ptr=strtok (NULL, " , \t");
-			if (indicator_idv[i]==0) {continue;}
-
-			if (strcmp(ch_ptr, "NA")==0) {gsl_vector_set(x_miss, c_phen, 0.0); n_miss++;}
-			else {
-				geno=atof(ch_ptr);
-
-				gsl_vector_set(x, c_phen, geno);
-				gsl_vector_set(x_miss, c_phen, 1.0);
-				x_mean+=geno;
-			}
-			c_phen++;
-		}
-
-		x_mean/=(double)(ni_test-n_miss);
+	  !safeGetline(infile, line).eof();
+	  if (t%d_pace==0 || t==(ns_total-1)) {
+	    ProgressBar ("Reading SNPs  ", t, ns_total-1);
+	  }
+	  if (indicator_snp[t]==0) {continue;}
+	  
+	  ch_ptr=strtok ((char *)line.c_str(), " , \t");
+	  ch_ptr=strtok (NULL, " , \t");
+	  ch_ptr=strtok (NULL, " , \t");
+	  
+	  x_mean=0.0; c_phen=0; n_miss=0;
+	  gsl_vector_set_zero(x_miss);
+	  for (size_t i=0; i<ni_total; ++i) {
+	    ch_ptr=strtok (NULL, " , \t");
+	    if (indicator_idv[i]==0) {continue;}
+	    
+	    if (strcmp(ch_ptr, "NA")==0) {
+	      gsl_vector_set(x_miss, c_phen, 0.0);
+	      n_miss++;
+	    }
+	    else {
+	      geno=atof(ch_ptr);
+	      
+	      gsl_vector_set(x, c_phen, geno);
+	      gsl_vector_set(x_miss, c_phen, 1.0);
+	      x_mean+=geno;
+	    }
+	    c_phen++;
+	  }
+	  
+	  x_mean/=(double)(ni_test-n_miss);
+	  
+	  for (size_t i=0; i<ni_test; ++i) {
+	    if (gsl_vector_get (x_miss, i)==0) {gsl_vector_set(x, i, x_mean);}
+	    geno=gsl_vector_get(x, i);
+	  }
 
-		for (size_t i=0; i<ni_test; ++i) {
-			if (gsl_vector_get (x_miss, i)==0) {gsl_vector_set(x, i, x_mean);}
-			geno=gsl_vector_get(x, i);
-			//if (x_mean>1) {
-			//	gsl_vector_set(x, i, 2-geno);
-			//}
+	  gsl_vector_view Xlarge_col=gsl_matrix_column (Xlarge, csnp%msize);
+	  gsl_vector_memcpy (&Xlarge_col.vector, x);
+	  csnp++;
+	  
+	  if (csnp%msize==0 || csnp==t_last ) {
+	    size_t l=0;
+	    if (csnp%msize==0) {l=msize;} else {l=csnp%msize;}
+	    
+	    gsl_matrix_view Xlarge_sub =
+	      gsl_matrix_submatrix(Xlarge, 0, 0, Xlarge->size1, l);
+	    gsl_matrix_view UtXlarge_sub =
+	      gsl_matrix_submatrix(UtXlarge, 0, 0, UtXlarge->size1, l);
+	    
+	    time_start=clock();
+	    eigenlib_dgemm ("T", "N", 1.0, U, &Xlarge_sub.matrix, 0.0,
+			    &UtXlarge_sub.matrix);
+	    time_UtX+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
+	    
+	    gsl_matrix_set_zero (Xlarge);
+	    
+	    for (size_t i=0; i<l; i++) {
+	      gsl_vector_view UtXlarge_col=gsl_matrix_column (UtXlarge, i);
+	      gsl_vector_memcpy (&X_row.vector, &UtXlarge_col.vector);
+	      
+	      // Initial values.
+	      gsl_matrix_memcpy (V_g, V_g_null);
+	      gsl_matrix_memcpy (V_e, V_e_null);
+	      gsl_matrix_memcpy (B, B_null);
+	      
+	      time_start=clock();
+	      
+	      // 3 is before 1.
+	      if (a_mode==3 || a_mode==4) {
+		p_score=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y,
+				  V_g_null, V_e_null, UltVehiY, beta, Vbeta);
+		if (p_score<p_nr && crt==1) {
+		  logl_H1=MphNR ('R', 1, nr_prec*10, eval, X, Y, Hi_all,
+				 xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a,
+				 crt_b, crt_c);
+		  p_score=PCRT (3, d_size, p_score, crt_a, crt_b, crt_c);
 		}
+	      }
 
-		/*
-		//calculate statistics
-		time_start=clock();
-		gsl_blas_dgemv (CblasTrans, 1.0, U, x, 0.0, &X_row.vector);
-		time_UtX+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
-		*/
-
-		gsl_vector_view Xlarge_col=gsl_matrix_column (Xlarge, csnp%msize);
-		gsl_vector_memcpy (&Xlarge_col.vector, x);
-		csnp++;
-
-		if (csnp%msize==0 || csnp==t_last ) {
-		  size_t l=0;
-		  if (csnp%msize==0) {l=msize;} else {l=csnp%msize;}
-
-		  gsl_matrix_view Xlarge_sub=gsl_matrix_submatrix(Xlarge, 0, 0, Xlarge->size1, l);
-		  gsl_matrix_view UtXlarge_sub=gsl_matrix_submatrix(UtXlarge, 0, 0, UtXlarge->size1, l);
-
-		  time_start=clock();
-		  eigenlib_dgemm ("T", "N", 1.0, U, &Xlarge_sub.matrix, 0.0, &UtXlarge_sub.matrix);
-		  time_UtX+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
-
-		  gsl_matrix_set_zero (Xlarge);
-
-		  for (size_t i=0; i<l; i++) {
-		    gsl_vector_view UtXlarge_col=gsl_matrix_column (UtXlarge, i);
-		    gsl_vector_memcpy (&X_row.vector, &UtXlarge_col.vector);
-
-		    //initial values
-		    gsl_matrix_memcpy (V_g, V_g_null);
-		    gsl_matrix_memcpy (V_e, V_e_null);
-		    gsl_matrix_memcpy (B, B_null);
-
-		    time_start=clock();
-
-		    //3 is before 1
-		    if (a_mode==3 || a_mode==4) {
-		      p_score=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g_null, V_e_null, UltVehiY, beta, Vbeta);
-		      if (p_score<p_nr && crt==1) {
-			logl_H1=MphNR ('R', 1, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-			p_score=PCRT (3, d_size, p_score, crt_a, crt_b, crt_c);
-		      }
-		    }
-
-		    if (a_mode==2 || a_mode==4) {
-		      logl_H1=MphEM ('L', em_iter/10, em_prec*10, eval, X, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
-		      //calculate beta and Vbeta
-		      p_lrt=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-		      p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
-
-		      if (p_lrt<p_nr) {
-			logl_H1=MphNR ('L', nr_iter/10, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-			//calculate beta and Vbeta
-			p_lrt=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-			p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
-
-			if (crt==1) {
-			  p_lrt=PCRT (2, d_size, p_lrt, crt_a, crt_b, crt_c);
-			}
-		      }
-		    }
-
-		    if (a_mode==1 || a_mode==4) {
-		      logl_H1=MphEM ('R', em_iter/10, em_prec*10, eval, X, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
-		      p_wald=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-
-		      if (p_wald<p_nr) {
-			logl_H1=MphNR ('R', nr_iter/10, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-			p_wald=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-
-			if (crt==1) {
-			  p_wald=PCRT (1, d_size, p_wald, crt_a, crt_b, crt_c);
-			}
-		      }
-		    }
-
-		    //if (x_mean>1) {gsl_vector_scale(beta, -1.0);}
-
-		    time_opt+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
-
-		    //store summary data
-		    //SUMSTAT SNPs={snpInfo[t].get_chr(), snpInfo[t].get_rs(), snpInfo[t].get_pos(), n_miss, beta, se, lambda_remle, lambda_mle, p_wald, p_lrt, p_score};
-		    for (size_t i=0; i<d_size; i++) {
-		      v_beta[i]=gsl_vector_get (beta, i);
-		    }
-
-		    c=0;
-		    for (size_t i=0; i<d_size; i++) {
-		      for (size_t j=i; j<d_size; j++) {
-			v_Vg[c]=gsl_matrix_get (V_g, i, j);
-			v_Ve[c]=gsl_matrix_get (V_e, i, j);
-			v_Vbeta[c]=gsl_matrix_get (Vbeta, i, j);
-			c++;
-		      }
-		    }
+	      if (a_mode==2 || a_mode==4) {
+		logl_H1=MphEM ('L', em_iter/10, em_prec*10, eval, X, Y,
+			       U_hat, E_hat, OmegaU, OmegaE, UltVehiY,
+			       UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
+		
+		// Calculate beta and Vbeta.
+		p_lrt=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y,
+				V_g, V_e, UltVehiY, beta, Vbeta);
+		p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
+		
+		if (p_lrt<p_nr) {
+		  logl_H1=MphNR ('L', nr_iter/10, nr_prec*10, eval, X, Y,
+				 Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian,
+				 crt_a, crt_b, crt_c);
+		  
+		  // Calculate beta and Vbeta.
+		  p_lrt=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y,
+				  V_g, V_e, UltVehiY, beta, Vbeta);
+		  p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0),
+					 (double)d_size );
 
-		    MPHSUMSTAT SNPs={v_beta, p_wald, p_lrt, p_score, v_Vg, v_Ve, v_Vbeta};
-		    sumStat.push_back(SNPs);
+		  if (crt==1) {
+		    p_lrt=PCRT (2, d_size, p_lrt, crt_a, crt_b, crt_c);
 		  }
 		}
-    }
-	cout<<endl;
+	      }
+	      
+	      if (a_mode==1 || a_mode==4) {
+		logl_H1=MphEM ('R', em_iter/10, em_prec*10, eval, X, Y,
+			       U_hat, E_hat, OmegaU, OmegaE, UltVehiY,
+			       UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
+		p_wald=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g,
+				 V_e, UltVehiY, beta, Vbeta);
+		
+		if (p_wald<p_nr) {
+		  logl_H1=MphNR ('R', nr_iter/10, nr_prec*10, eval, X, Y,
+				 Hi_all, xHi_all, Hiy_all, V_g, V_e,
+				 Hessian, crt_a, crt_b, crt_c);
+		  p_wald=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y,
+				   V_g, V_e, UltVehiY, beta, Vbeta);
+		  
+		  if (crt==1) {
+		    p_wald=PCRT (1, d_size, p_wald, crt_a, crt_b, crt_c);
+		  }
+		}
+	      }
+	      
+	      time_opt+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
 
+	      // Store summary data.
+	      for (size_t i=0; i<d_size; i++) {
+		v_beta[i]=gsl_vector_get (beta, i);
+	      }
+	      
+	      c=0;
+	      for (size_t i=0; i<d_size; i++) {
+		for (size_t j=i; j<d_size; j++) {
+		  v_Vg[c]=gsl_matrix_get (V_g, i, j);
+		  v_Ve[c]=gsl_matrix_get (V_e, i, j);
+		  v_Vbeta[c]=gsl_matrix_get (Vbeta, i, j);
+		  c++;
+		}
+	      }
+	      
+	      MPHSUMSTAT SNPs={v_beta, p_wald, p_lrt, p_score, v_Vg,
+			       v_Ve, v_Vbeta};
+	      sumStat.push_back(SNPs);
+	    }
+	  }
+	}
+	cout<<endl;
 
 	infile.close();
 	infile.clear();
@@ -3925,14 +3953,8 @@ void MVLMM::AnalyzeBimbam (const gsl_matrix *U, const gsl_vector *eval,
 	return;
 }
 
-
-
-
-
-
-
-void MVLMM::AnalyzePlink (const gsl_matrix *U, const gsl_vector *eval, const gsl_matrix *UtW, const gsl_matrix *UtY)
-{
+void MVLMM::AnalyzePlink (const gsl_matrix *U, const gsl_vector *eval,
+			  const gsl_matrix *UtW, const gsl_matrix *UtY) {
 	string file_bed=file_bfile+".bed";
 	ifstream infile (file_bed.c_str(), ios::binary);
 	if (!infile) {cout<<"error reading bed file:"<<file_bed<<endl; return;}
@@ -3943,23 +3965,21 @@ void MVLMM::AnalyzePlink (const gsl_matrix *U, const gsl_vector *eval, const gsl
 	char ch[1];
 	bitset<8> b;
 
-	//	double lambda_mle=0, lambda_remle=0, beta=0, se=0, ;
 	double logl_H0=0.0, logl_H1=0.0, p_wald=0, p_lrt=0, p_score=0;
 	double crt_a, crt_b, crt_c;
 	int n_bit, n_miss, ci_total, ci_test;
 	double geno, x_mean;
 	size_t c=0;
-	//	double s=0.0;
 	size_t n_size=UtY->size1, d_size=UtY->size2, c_size=UtW->size2;
 	size_t dc_size=d_size*(c_size+1), v_size=d_size*(d_size+1)/2;
 
-	//create a large matrix
+	// Create a large matrix.
 	size_t msize=10000;
 	gsl_matrix *Xlarge=gsl_matrix_alloc (U->size1, msize);
 	gsl_matrix *UtXlarge=gsl_matrix_alloc (U->size1, msize);
 	gsl_matrix_set_zero(Xlarge);
 
-	//large matrices for EM
+	// Large matrices for EM.
 	gsl_matrix *U_hat=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *E_hat=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *OmegaU=gsl_matrix_alloc (d_size, n_size);
@@ -3969,10 +3989,16 @@ void MVLMM::AnalyzePlink (const gsl_matrix *U, const gsl_vector *eval, const gsl
 	gsl_matrix *UltVehiU=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *UltVehiE=gsl_matrix_alloc (d_size, n_size);
 
-	//large matrices for NR
-	gsl_matrix *Hi_all=gsl_matrix_alloc (d_size, d_size*n_size);		//each dxd block is H_k^{-1}
-	gsl_matrix *Hiy_all=gsl_matrix_alloc (d_size, n_size);				//each column is H_k^{-1}y_k
-	gsl_matrix *xHi_all=gsl_matrix_alloc (dc_size, d_size*n_size);		//each dcxdc block is x_k\otimes H_k^{-1}
+	// Large matrices for NR.
+	// Each dxd block is H_k^{-1}.
+	gsl_matrix *Hi_all=gsl_matrix_alloc (d_size, d_size*n_size);
+
+	// Each column is H_k^{-1}y_k.
+	gsl_matrix *Hiy_all=gsl_matrix_alloc (d_size, n_size);
+
+	// Each dcxdc block is x_k\otimes H_k^{-1}.
+	gsl_matrix *xHi_all=gsl_matrix_alloc (dc_size, d_size*n_size);
+	
 	gsl_matrix *Hessian=gsl_matrix_alloc (v_size*2, v_size*2);
 
 	gsl_vector *x=gsl_vector_alloc (n_size);
@@ -3985,7 +4011,7 @@ void MVLMM::AnalyzePlink (const gsl_matrix *U, const gsl_vector *eval, const gsl
 	gsl_vector *beta=gsl_vector_alloc (d_size);
 	gsl_matrix *Vbeta=gsl_matrix_alloc (d_size, d_size);
 
-	//null estimates for initial values
+	// Null estimates for initial values.
 	gsl_matrix *V_g_null=gsl_matrix_alloc (d_size, d_size);
 	gsl_matrix *V_e_null=gsl_matrix_alloc (d_size, d_size);
 	gsl_matrix *B_null=gsl_matrix_alloc (d_size, c_size+1);
@@ -3993,7 +4019,8 @@ void MVLMM::AnalyzePlink (const gsl_matrix *U, const gsl_vector *eval, const gsl
 
 	gsl_matrix_view X_sub=gsl_matrix_submatrix (X, 0, 0, c_size, n_size);
 	gsl_matrix_view B_sub=gsl_matrix_submatrix (B, 0, 0, d_size, c_size);
-	gsl_matrix_view xHi_all_sub=gsl_matrix_submatrix (xHi_all, 0, 0, d_size*c_size, d_size*n_size);
+	gsl_matrix_view xHi_all_sub =
+	  gsl_matrix_submatrix (xHi_all, 0, 0, d_size*c_size, d_size*n_size);
 
 	gsl_matrix_transpose_memcpy (Y, UtY);
 	gsl_matrix_transpose_memcpy (&X_sub.matrix, UtW);
@@ -4003,33 +4030,38 @@ void MVLMM::AnalyzePlink (const gsl_matrix *U, const gsl_vector *eval, const gsl
 	gsl_vector_view B_col=gsl_matrix_column(B, c_size);
 	gsl_vector_set_zero(&B_col.vector);
 
-	//time_start=clock();
-	MphInitial(em_iter, em_prec, nr_iter, nr_prec, eval, &X_sub.matrix, Y, l_min, l_max, n_region, V_g, V_e, &B_sub.matrix);
+	MphInitial(em_iter, em_prec, nr_iter, nr_prec, eval, &X_sub.matrix,
+		   Y, l_min, l_max, n_region, V_g, V_e, &B_sub.matrix);
 
-	logl_H0=MphEM ('R', em_iter, em_prec, eval, &X_sub.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub.matrix);
-	logl_H0=MphNR ('R', nr_iter, nr_prec, eval, &X_sub.matrix, Y, Hi_all, &xHi_all_sub.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-	MphCalcBeta (eval, &X_sub.matrix, Y, V_g, V_e, UltVehiY, &B_sub.matrix, se_B_null);
-	//cout<<"time for REML in the null = "<<(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0)<<endl;
+	logl_H0=MphEM ('R', em_iter, em_prec, eval, &X_sub.matrix, Y, U_hat,
+		       E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU,
+		       UltVehiE, V_g, V_e, &B_sub.matrix);
+	logl_H0=MphNR ('R', nr_iter, nr_prec, eval, &X_sub.matrix, Y, Hi_all,
+		       &xHi_all_sub.matrix, Hiy_all, V_g, V_e, Hessian,
+		       crt_a, crt_b, crt_c);
+	MphCalcBeta (eval, &X_sub.matrix, Y, V_g, V_e, UltVehiY,
+		     &B_sub.matrix, se_B_null);
 
 	c=0;
 	Vg_remle_null.clear();
 	Ve_remle_null.clear();
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			Vg_remle_null.push_back(gsl_matrix_get (V_g, i, j) );
-			Ve_remle_null.push_back(gsl_matrix_get (V_e, i, j) );
-			VVg_remle_null.push_back(gsl_matrix_get (Hessian, c, c) );
-			VVe_remle_null.push_back(gsl_matrix_get (Hessian, c+v_size, c+v_size) );
-			c++;
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    Vg_remle_null.push_back(gsl_matrix_get (V_g, i, j) );
+	    Ve_remle_null.push_back(gsl_matrix_get (V_e, i, j) );
+	    VVg_remle_null.push_back(gsl_matrix_get (Hessian, c, c) );
+	    VVe_remle_null.push_back(gsl_matrix_get(Hessian,c+v_size,
+						    c+v_size));
+	    c++;
+	  }
 	}
 	beta_remle_null.clear();
 	se_beta_remle_null.clear();
 	for (size_t i=0; i<se_B_null->size1; i++) {
-		for (size_t j=0; j<se_B_null->size2; j++) {
-			beta_remle_null.push_back(gsl_matrix_get(B, i, j) );
-			se_beta_remle_null.push_back(gsl_matrix_get(se_B_null, i, j) );
-		}
+	  for (size_t j=0; j<se_B_null->size2; j++) {
+	    beta_remle_null.push_back(gsl_matrix_get(B, i, j) );
+	    se_beta_remle_null.push_back(gsl_matrix_get(se_B_null, i, j) );
+	  }
 	}
 	logl_remle_H0=logl_H0;
 
@@ -4037,123 +4069,124 @@ void MVLMM::AnalyzePlink (const gsl_matrix *U, const gsl_vector *eval, const gsl
 	cout.precision(4);
 	cout<<"REMLE estimate for Vg in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_g, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_g, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Vg): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"REMLE estimate for Ve in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_e, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_e, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Ve): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
-		}
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
+	  }
 		cout<<endl;
 	}
 	cout<<"REMLE likelihood = "<<logl_H0<<endl;
 
-	//time_start=clock();
-	logl_H0=MphEM ('L', em_iter, em_prec, eval, &X_sub.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub.matrix);
-	logl_H0=MphNR ('L', nr_iter, nr_prec, eval, &X_sub.matrix, Y, Hi_all, &xHi_all_sub.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-	MphCalcBeta (eval, &X_sub.matrix, Y, V_g, V_e, UltVehiY, &B_sub.matrix, se_B_null);
-	//cout<<"time for MLE in the null = "<<(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0)<<endl;
+	logl_H0=MphEM ('L', em_iter, em_prec, eval, &X_sub.matrix, Y,
+		       U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX,
+		       UltVehiU, UltVehiE, V_g, V_e, &B_sub.matrix);
+	logl_H0=MphNR ('L', nr_iter, nr_prec, eval, &X_sub.matrix, Y,
+		       Hi_all, &xHi_all_sub.matrix, Hiy_all, V_g, V_e,
+		       Hessian, crt_a, crt_b, crt_c);
+	MphCalcBeta (eval, &X_sub.matrix, Y, V_g, V_e, UltVehiY,
+		     &B_sub.matrix, se_B_null);
 
 	c=0;
 	Vg_mle_null.clear();
 	Ve_mle_null.clear();
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			Vg_mle_null.push_back(gsl_matrix_get (V_g, i, j) );
-			Ve_mle_null.push_back(gsl_matrix_get (V_e, i, j) );
-			VVg_mle_null.push_back(gsl_matrix_get (Hessian, c, c) );
-			VVe_mle_null.push_back(gsl_matrix_get (Hessian, c+v_size, c+v_size) );
-			c++;
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    Vg_mle_null.push_back(gsl_matrix_get (V_g, i, j) );
+	    Ve_mle_null.push_back(gsl_matrix_get (V_e, i, j) );
+	    VVg_mle_null.push_back(gsl_matrix_get (Hessian, c, c) );
+	    VVe_mle_null.push_back(gsl_matrix_get(Hessian,c+v_size,c+v_size));
+	    c++;
+	  }
 	}
 	beta_mle_null.clear();
 	se_beta_mle_null.clear();
 	for (size_t i=0; i<se_B_null->size1; i++) {
-		for (size_t j=0; j<se_B_null->size2; j++) {
-			beta_mle_null.push_back(gsl_matrix_get(B, i, j) );
-			se_beta_mle_null.push_back(gsl_matrix_get(se_B_null, i, j) );
-		}
+	  for (size_t j=0; j<se_B_null->size2; j++) {
+	    beta_mle_null.push_back(gsl_matrix_get(B, i, j) );
+	    se_beta_mle_null.push_back(gsl_matrix_get(se_B_null, i, j) );
+	  }
 	}
 	logl_mle_H0=logl_H0;
 
 	cout<<"MLE estimate for Vg in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_g, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_g, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Vg): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"MLE estimate for Ve in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_e, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_e, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Ve): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"MLE likelihood = "<<logl_H0<<endl;
-
+	
 	vector<double> v_beta, v_Vg, v_Ve, v_Vbeta;
 	for (size_t i=0; i<d_size; i++) {
-		v_beta.push_back(0.0);
+	  v_beta.push_back(0.0);
 	}
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			v_Vg.push_back(0.0);
-			v_Ve.push_back(0.0);
-			v_Vbeta.push_back(0.0);
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    v_Vg.push_back(0.0);
+	    v_Ve.push_back(0.0);
+	    v_Vbeta.push_back(0.0);
+	  }
 	}
-
+	
 	gsl_matrix_memcpy (V_g_null, V_g);
 	gsl_matrix_memcpy (V_e_null, V_e);
 	gsl_matrix_memcpy (B_null, B);
-
-
-	//start reading genotypes and analyze
-
-	//calculate n_bit and c, the number of bit for each snp
+	
+	// Start reading genotypes and analyze.
+	// Calculate n_bit and c, the number of bit for each snp.
 	if (ni_total%4==0) {n_bit=ni_total/4;}
 	else {n_bit=ni_total/4+1; }
 
-	//print the first three majic numbers
+	// Print the first three magic numbers.
 	for (int i=0; i<3; ++i) {
-		infile.read(ch,1);
-		b=ch[0];
+	  infile.read(ch,1);
+	  b=ch[0];
 	}
 
 	size_t csnp=0, t_last=0;
@@ -4162,168 +4195,161 @@ void MVLMM::AnalyzePlink (const gsl_matrix *U, const gsl_vector *eval, const gsl
 	  t_last++;
 	}
 	for (vector<SNPINFO>::size_type t=0; t<snpInfo.size(); ++t) {
-		if (t%d_pace==0 || t==snpInfo.size()-1) {ProgressBar ("Reading SNPs  ", t, snpInfo.size()-1);}
-		if (indicator_snp[t]==0) {continue;}
-
-		//if (t>=0) {break;}
-		//if (snpInfo[t].rs_number!="MAG18140902") {continue;}
-		//cout<<t<<endl;
-
-		infile.seekg(t*n_bit+3);		//n_bit, and 3 is the number of magic numbers
-
-		//read genotypes
-		x_mean=0.0;	n_miss=0; ci_total=0; ci_test=0;
-		for (int i=0; i<n_bit; ++i) {
-			infile.read(ch,1);
-			b=ch[0];
-			for (size_t j=0; j<4; ++j) {                //minor allele homozygous: 2.0; major: 0.0;
-				if ((i==(n_bit-1)) && ci_total==(int)ni_total) {break;}
-				if (indicator_idv[ci_total]==0) {ci_total++; continue;}
-
-				if (b[2*j]==0) {
-					if (b[2*j+1]==0) {gsl_vector_set(x, ci_test, 2); x_mean+=2.0; }
-					else {gsl_vector_set(x, ci_test, 1); x_mean+=1.0; }
-				}
-				else {
-					if (b[2*j+1]==1) {gsl_vector_set(x, ci_test, 0); }
-					else {gsl_vector_set(x, ci_test, -9); n_miss++; }
-				}
-
-				ci_total++;
-				ci_test++;
-			}
-		}
-
-		x_mean/=(double)(ni_test-n_miss);
-
-		for (size_t i=0; i<ni_test; ++i) {
-			geno=gsl_vector_get(x,i);
-			if (geno==-9) {gsl_vector_set(x, i, x_mean); geno=x_mean;}
-			//if (x_mean>1) {
-			//	gsl_vector_set(x, i, 2-geno);
-			//}
-		}
-
-		/*
-		if (t==0) {
-			ofstream outfile ("./snp1.txt", ofstream::out);
-			if (!outfile) {cout<<"error writing file: "<<endl; return;}
-			for (size_t i=0; i<x->size; i++) {
-				outfile<<gsl_vector_get(x, i)<<endl;
-			}
-			outfile.clear();
-			outfile.close();
-		}
-		*/
-
-		/*
-		//calculate statistics
-		time_start=clock();
-		gsl_blas_dgemv (CblasTrans, 1.0, U, x, 0.0, &X_row.vector);
-		time_UtX+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
-		*/
-
-		gsl_vector_view Xlarge_col=gsl_matrix_column (Xlarge, csnp%msize);
-		gsl_vector_memcpy (&Xlarge_col.vector, x);
-		csnp++;
-
-		if (csnp%msize==0 || csnp==t_last ) {
-		  size_t l=0;
-		  if (csnp%msize==0) {l=msize;} else {l=csnp%msize;}
-
-		  gsl_matrix_view Xlarge_sub=gsl_matrix_submatrix(Xlarge, 0, 0, Xlarge->size1, l);
-		  gsl_matrix_view UtXlarge_sub=gsl_matrix_submatrix(UtXlarge, 0, 0, UtXlarge->size1, l);
-
-		  time_start=clock();
-		  eigenlib_dgemm ("T", "N", 1.0, U, &Xlarge_sub.matrix, 0.0, &UtXlarge_sub.matrix);
-		  time_UtX+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
-
-		  gsl_matrix_set_zero (Xlarge);
-
-		  for (size_t i=0; i<l; i++) {
-		    gsl_vector_view UtXlarge_col=gsl_matrix_column (UtXlarge, i);
-		    gsl_vector_memcpy (&X_row.vector, &UtXlarge_col.vector);
-
-		    //initial values
-		    gsl_matrix_memcpy (V_g, V_g_null);
-		    gsl_matrix_memcpy (V_e, V_e_null);
-		    gsl_matrix_memcpy (B, B_null);
-
-		    time_start=clock();
-
-		    //3 is before 1
-		    if (a_mode==3 || a_mode==4) {
-		      p_score=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g_null, V_e_null, UltVehiY, beta, Vbeta);
-
-		      if (p_score<p_nr && crt==1) {
-			logl_H1=MphNR ('R', 1, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-			p_score=PCRT (3, d_size, p_score, crt_a, crt_b, crt_c);
-		      }
-		    }
-
-		    if (a_mode==2 || a_mode==4) {
-		      logl_H1=MphEM ('L', em_iter/10, em_prec*10, eval, X, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
-		      //calculate beta and Vbeta
-		      p_lrt=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-		      p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
-
-		      if (p_lrt<p_nr) {
-			logl_H1=MphNR ('L', nr_iter/10, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-
-			//calculate beta and Vbeta
-			p_lrt=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-			p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
-			if (crt==1) {
-			  p_lrt=PCRT (2, d_size, p_lrt, crt_a, crt_b, crt_c);
-			}
-		      }
-		    }
+	  if (t%d_pace==0 || t==snpInfo.size()-1) {
+	    ProgressBar ("Reading SNPs  ", t, snpInfo.size()-1);
+	  }
+	  if (indicator_snp[t]==0) {continue;}
 
-		    if (a_mode==1 || a_mode==4) {
-		      logl_H1=MphEM ('R', em_iter/10, em_prec*10, eval, X, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
-		      p_wald=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
+	  // n_bit, and 3 is the number of magic numbers.
+	  infile.seekg(t*n_bit+3);		
 
-		      if (p_wald<p_nr) {
-			logl_H1=MphNR ('R', nr_iter/10, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-			p_wald=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
+	  //read genotypes
+	  x_mean=0.0;	n_miss=0; ci_total=0; ci_test=0;
+	  for (int i=0; i<n_bit; ++i) {
+	    infile.read(ch,1);
+	    b=ch[0];
 
-			if (crt==1) {
-			  p_wald=PCRT (1, d_size, p_wald, crt_a, crt_b, crt_c);
+	    // Minor allele homozygous: 2.0; major: 0.0;
+	    for (size_t j=0; j<4; ++j) {                
+	      if ((i==(n_bit-1)) && ci_total==(int)ni_total) {break;}
+	      if (indicator_idv[ci_total]==0) {ci_total++; continue;}
+	      
+	      if (b[2*j]==0) {
+		if (b[2*j+1]==0) {gsl_vector_set(x, ci_test, 2); x_mean+=2.0; }
+		else {gsl_vector_set(x, ci_test, 1); x_mean+=1.0; }
+	      }
+	      else {
+		if (b[2*j+1]==1) {gsl_vector_set(x, ci_test, 0); }
+		else {gsl_vector_set(x, ci_test, -9); n_miss++; }
+	      }
+	      
+	      ci_total++;
+	      ci_test++;
 			}
-		      }
-		    }
-
-		    //cout<<setprecision(10)<<p_wald<<"\t"<<p_lrt<<"\t"<<p_score<<endl;
-
-		    //if (x_mean>1) {gsl_vector_scale(beta, -1.0);}
-
-		    time_opt+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
-
-		    //store summary data
-		    //SUMSTAT SNPs={snpInfo[t].get_chr(), snpInfo[t].get_rs(), snpInfo[t].get_pos(), n_miss, beta, se, lambda_remle, lambda_mle, p_wald, p_lrt, p_score};
-		    for (size_t i=0; i<d_size; i++) {
-		      v_beta[i]=gsl_vector_get (beta, i);
-		    }
-
-		    c=0;
-		    for (size_t i=0; i<d_size; i++) {
-		      for (size_t j=i; j<d_size; j++) {
-			v_Vg[c]=gsl_matrix_get (V_g, i, j);
-			v_Ve[c]=gsl_matrix_get (V_e, i, j);
-			v_Vbeta[c]=gsl_matrix_get (Vbeta, i, j);
-			c++;
-		      }
-		    }
+	  }
+	  
+	  x_mean/=(double)(ni_test-n_miss);
+	  
+	  for (size_t i=0; i<ni_test; ++i) {
+	    geno=gsl_vector_get(x,i);
+	    if (geno==-9) {gsl_vector_set(x, i, x_mean); geno=x_mean;}
+	  }
 
-		    MPHSUMSTAT SNPs={v_beta, p_wald, p_lrt, p_score, v_Vg, v_Ve, v_Vbeta};
-		    sumStat.push_back(SNPs);
+	  gsl_vector_view Xlarge_col=gsl_matrix_column (Xlarge, csnp%msize);
+	  gsl_vector_memcpy (&Xlarge_col.vector, x);
+	  csnp++;
+	  
+	  if (csnp%msize==0 || csnp==t_last ) {
+	    size_t l=0;
+	    if (csnp%msize==0) {l=msize;} else {l=csnp%msize;}
+	    
+	    gsl_matrix_view Xlarge_sub =
+	      gsl_matrix_submatrix(Xlarge, 0, 0, Xlarge->size1, l);
+	    gsl_matrix_view UtXlarge_sub =
+	      gsl_matrix_submatrix(UtXlarge, 0, 0, UtXlarge->size1, l);
+	    
+	    time_start=clock();
+	    eigenlib_dgemm ("T", "N", 1.0, U, &Xlarge_sub.matrix, 0.0,
+			    &UtXlarge_sub.matrix);
+	    time_UtX+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
+	    
+	    gsl_matrix_set_zero (Xlarge);
+	    
+	    for (size_t i=0; i<l; i++) {
+	      gsl_vector_view UtXlarge_col=gsl_matrix_column (UtXlarge, i);
+	      gsl_vector_memcpy (&X_row.vector, &UtXlarge_col.vector);
+	      
+	      // Initial values.
+	      gsl_matrix_memcpy (V_g, V_g_null);
+	      gsl_matrix_memcpy (V_e, V_e_null);
+	      gsl_matrix_memcpy (B, B_null);
+	      
+	      time_start=clock();
+	      
+	      // 3 is before 1.
+	      if (a_mode==3 || a_mode==4) {
+		p_score=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y,
+				  V_g_null, V_e_null, UltVehiY, beta, Vbeta);
+		
+		if (p_score<p_nr && crt==1) {
+		  logl_H1=MphNR ('R', 1, nr_prec*10, eval, X, Y, Hi_all,
+				 xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a,
+				 crt_b, crt_c);
+		  p_score=PCRT (3, d_size, p_score, crt_a, crt_b, crt_c);
+		}
+	      }
+	      
+	      if (a_mode==2 || a_mode==4) {
+		logl_H1=MphEM ('L', em_iter/10, em_prec*10, eval, X, Y,
+			       U_hat, E_hat, OmegaU, OmegaE, UltVehiY,
+			       UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
+		
+		// Calculate beta and Vbeta.
+		p_lrt=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g,
+				V_e, UltVehiY, beta, Vbeta);
+		p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
+		
+		if (p_lrt<p_nr) {
+		  logl_H1=MphNR ('L', nr_iter/10, nr_prec*10, eval, X, Y,
+				 Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian,
+				 crt_a, crt_b, crt_c);
+		  
+		  // Calculate beta and Vbeta.
+		  p_lrt=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g,
+				  V_e, UltVehiY, beta, Vbeta);
+		  p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0),
+					 (double)d_size );
+		  if (crt==1) {
+		    p_lrt=PCRT (2, d_size, p_lrt, crt_a, crt_b, crt_c);
+		  }
+		}
+	      }
+	      
+	      if (a_mode==1 || a_mode==4) {
+		logl_H1=MphEM ('R', em_iter/10, em_prec*10, eval, X, Y,
+			       U_hat, E_hat, OmegaU, OmegaE, UltVehiY,
+			       UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
+		p_wald=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y, V_g,
+				 V_e, UltVehiY, beta, Vbeta);
+		
+		if (p_wald<p_nr) {
+		  logl_H1=MphNR ('R', nr_iter/10, nr_prec*10, eval, X, Y,
+				 Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian,
+				 crt_a, crt_b, crt_c);
+		  p_wald=MphCalcP (eval, &X_row.vector, &X_sub.matrix, Y,
+				   V_g, V_e, UltVehiY, beta, Vbeta);
+		  
+		  if (crt==1) {
+		    p_wald=PCRT (1, d_size, p_wald, crt_a, crt_b, crt_c);
 		  }
 		}
+	      }
+	      
+	      time_opt+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
+
+	      // Store summary data.
+	      for (size_t i=0; i<d_size; i++) {
+		v_beta[i]=gsl_vector_get (beta, i);
+	      }
+	      
+	      c=0;
+	      for (size_t i=0; i<d_size; i++) {
+		for (size_t j=i; j<d_size; j++) {
+		  v_Vg[c]=gsl_matrix_get (V_g, i, j);
+		  v_Ve[c]=gsl_matrix_get (V_e, i, j);
+		  v_Vbeta[c]=gsl_matrix_get (Vbeta, i, j);
+		  c++;
+		}
+	      }
+	      
+	      MPHSUMSTAT SNPs={v_beta, p_wald, p_lrt, p_score, v_Vg,
+			       v_Ve, v_Vbeta};
+	      sumStat.push_back(SNPs);
+	    }
+	  }
 	}
 	cout<<endl;
 
-	//cout<<"time_opt = "<<time_opt<<endl;
-
 	infile.close();
 	infile.clear();
 
@@ -4362,19 +4388,21 @@ void MVLMM::AnalyzePlink (const gsl_matrix *U, const gsl_vector *eval, const gsl
 	return;
 }
 
-
-
-
-//calculate Vg, Ve, B, se(B) in the null mvLMM model
-//both B and se_B are d by c matrices
-void CalcMvLmmVgVeBeta (const gsl_vector *eval, const gsl_matrix *UtW, const gsl_matrix *UtY, const size_t em_iter, const size_t nr_iter, const double em_prec, const double nr_prec, const double l_min, const double l_max, const size_t n_region, gsl_matrix *V_g, gsl_matrix *V_e, gsl_matrix *B, gsl_matrix *se_B)
-{
+// Calculate Vg, Ve, B, se(B) in the null mvLMM model.
+// Both B and se_B are d by c matrices.
+void CalcMvLmmVgVeBeta (const gsl_vector *eval, const gsl_matrix *UtW,
+			const gsl_matrix *UtY, const size_t em_iter,
+			const size_t nr_iter, const double em_prec,
+			const double nr_prec, const double l_min,
+			const double l_max, const size_t n_region,
+			gsl_matrix *V_g, gsl_matrix *V_e, gsl_matrix *B,
+			gsl_matrix *se_B) {
 	size_t n_size=UtY->size1, d_size=UtY->size2, c_size=UtW->size2;
 	size_t dc_size=d_size*c_size, v_size=d_size*(d_size+1)/2;
 
 	double logl, crt_a, crt_b, crt_c;
 
-	//large matrices for EM
+	// Large matrices for EM.
 	gsl_matrix *U_hat=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *E_hat=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *OmegaU=gsl_matrix_alloc (d_size, n_size);
@@ -4384,25 +4412,34 @@ void CalcMvLmmVgVeBeta (const gsl_vector *eval, const gsl_matrix *UtW, const gsl
 	gsl_matrix *UltVehiU=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *UltVehiE=gsl_matrix_alloc (d_size, n_size);
 
-	//large matrices for NR
-	gsl_matrix *Hi_all=gsl_matrix_alloc (d_size, d_size*n_size);		//each dxd block is H_k^{-1}
-	gsl_matrix *Hiy_all=gsl_matrix_alloc (d_size, n_size);				//each column is H_k^{-1}y_k
-	gsl_matrix *xHi_all=gsl_matrix_alloc (dc_size, d_size*n_size);		//each dcxdc block is x_k\otimes H_k^{-1}
+	// Large matrices for NR.
+	// Each dxd block is H_k^{-1}.
+	gsl_matrix *Hi_all=gsl_matrix_alloc (d_size, d_size*n_size);
+	
+	// Each column is H_k^{-1}y_k.
+	gsl_matrix *Hiy_all=gsl_matrix_alloc (d_size, n_size);		
+
+	// Each dcxdc block is x_k\otimes H_k^{-1}.
+	gsl_matrix *xHi_all=gsl_matrix_alloc (dc_size, d_size*n_size);	
 	gsl_matrix *Hessian=gsl_matrix_alloc (v_size*2, v_size*2);
 
-	//transpose matrices
+	// Transpose matrices.
 	gsl_matrix *Y=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *W=gsl_matrix_alloc (c_size, n_size);
 	gsl_matrix_transpose_memcpy (Y, UtY);
 	gsl_matrix_transpose_memcpy (W, UtW);
 
-	//initial, EM, NR, and calculate B
-	MphInitial(em_iter, em_prec, nr_iter, nr_prec, eval, W, Y, l_min, l_max, n_region, V_g, V_e, B);
-	logl=MphEM ('R', em_iter, em_prec, eval, W, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
-	logl=MphNR ('R', nr_iter, nr_prec, eval, W, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
+	// Initial, EM, NR, and calculate B.
+	MphInitial(em_iter, em_prec, nr_iter, nr_prec, eval, W, Y, 
+		   l_min, l_max, n_region, V_g, V_e, B);
+	logl=MphEM ('R', em_iter, em_prec, eval, W, Y, U_hat, E_hat, 
+		    OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, 
+		    UltVehiE, V_g, V_e, B);
+	logl=MphNR ('R', nr_iter, nr_prec, eval, W, Y, Hi_all, xHi_all, 
+		    Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
 	MphCalcBeta (eval, W, Y, V_g, V_e, UltVehiY, B, se_B);
 
-	//free matrices
+	// Free matrices.
 	gsl_matrix_free(U_hat);
 	gsl_matrix_free(E_hat);
 	gsl_matrix_free(OmegaU);
@@ -4423,15 +4460,14 @@ void CalcMvLmmVgVeBeta (const gsl_vector *eval, const gsl_matrix *UtW, const gsl
 	return;
 }
 
-
-
-
-
-void MVLMM::AnalyzeBimbamGXE (const gsl_matrix *U, const gsl_vector *eval, const gsl_matrix *UtW, const gsl_matrix *UtY, const gsl_vector *env)
-{
+void MVLMM::AnalyzeBimbamGXE (const gsl_matrix *U, const gsl_vector *eval, 
+			      const gsl_matrix *UtW, const gsl_matrix *UtY, 
+			      const gsl_vector *env) {
 	igzstream infile (file_geno.c_str(), igzstream::in);
-//	ifstream infile (file_geno.c_str(), ifstream::in);
-	if (!infile) {cout<<"error reading genotype file:"<<file_geno<<endl; return;}
+	if (!infile) {
+	  cout<<"error reading genotype file:"<<file_geno<<endl; 
+	  return;
+	}
 
 	clock_t time_start=clock();
 	time_UtX=0; time_opt=0;
@@ -4439,17 +4475,15 @@ void MVLMM::AnalyzeBimbamGXE (const gsl_matrix *U, const gsl_vector *eval, const
 	string line;
 	char *ch_ptr;
 
-	//	double lambda_mle=0, lambda_remle=0, beta=0, se=0, ;
 	double logl_H0=0.0, logl_H1=0.0, p_wald=0, p_lrt=0, p_score=0;
 	double crt_a, crt_b, crt_c;
 	int n_miss, c_phen;
 	double geno, x_mean;
 	size_t c=0;
-	//	double s=0.0;
 	size_t n_size=UtY->size1, d_size=UtY->size2, c_size=UtW->size2+2;
 	size_t dc_size=d_size*(c_size+1), v_size=d_size*(d_size+1)/2;
 
-	//large matrices for EM
+	// Large matrices for EM.
 	gsl_matrix *U_hat=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *E_hat=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *OmegaU=gsl_matrix_alloc (d_size, n_size);
@@ -4459,10 +4493,15 @@ void MVLMM::AnalyzeBimbamGXE (const gsl_matrix *U, const gsl_vector *eval, const
 	gsl_matrix *UltVehiU=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *UltVehiE=gsl_matrix_alloc (d_size, n_size);
 
-	//large matrices for NR
-	gsl_matrix *Hi_all=gsl_matrix_alloc (d_size, d_size*n_size);	//each dxd block is H_k^{-1}
-	gsl_matrix *Hiy_all=gsl_matrix_alloc (d_size, n_size);		//each column is H_k^{-1}y_k
-	gsl_matrix *xHi_all=gsl_matrix_alloc (dc_size, d_size*n_size);  //each dcxdc block is x_k\otimes H_k^{-1}
+	// Large matrices for NR.
+	// Each dxd block is H_k^{-1}.
+	gsl_matrix *Hi_all=gsl_matrix_alloc (d_size, d_size*n_size);
+
+	// Each column is H_k^{-1}y_k.
+	gsl_matrix *Hiy_all=gsl_matrix_alloc (d_size, n_size);
+
+	// Each dcxdc block is x_k\otimes H_k^{-1}.
+	gsl_matrix *xHi_all=gsl_matrix_alloc (dc_size, d_size*n_size);
 	gsl_matrix *Hessian=gsl_matrix_alloc (v_size*2, v_size*2);
 
 	gsl_vector *x=gsl_vector_alloc (n_size);
@@ -4476,24 +4515,27 @@ void MVLMM::AnalyzeBimbamGXE (const gsl_matrix *U, const gsl_vector *eval, const
 	gsl_vector *beta=gsl_vector_alloc (d_size);
 	gsl_matrix *Vbeta=gsl_matrix_alloc (d_size, d_size);
 
-	//null estimates for initial values; including env but not including x
+	// Null estimates for initial values; including env but not
+	// including x.
 	gsl_matrix *V_g_null=gsl_matrix_alloc (d_size, d_size);
 	gsl_matrix *V_e_null=gsl_matrix_alloc (d_size, d_size);
 	gsl_matrix *B_null=gsl_matrix_alloc (d_size, c_size+1);
 	gsl_matrix *se_B_null1=gsl_matrix_alloc (d_size, c_size-1);
 	gsl_matrix *se_B_null2=gsl_matrix_alloc (d_size, c_size);
 
-	gsl_matrix_view X_sub1=gsl_matrix_submatrix (X, 0, 0, c_size-1, n_size);
-	gsl_matrix_view B_sub1=gsl_matrix_submatrix (B, 0, 0, d_size, c_size-1);
-	gsl_matrix_view xHi_all_sub1=gsl_matrix_submatrix (xHi_all, 0, 0, d_size*(c_size-1), d_size*n_size);
+	gsl_matrix_view X_sub1=gsl_matrix_submatrix(X,0,0,c_size-1,n_size);
+	gsl_matrix_view B_sub1=gsl_matrix_submatrix(B,0,0,d_size,c_size-1);
+	gsl_matrix_view xHi_all_sub1=
+	  gsl_matrix_submatrix(xHi_all,0,0,d_size*(c_size-1),d_size*n_size);
 
 	gsl_matrix_view X_sub2=gsl_matrix_submatrix (X, 0, 0, c_size, n_size);
 	gsl_matrix_view B_sub2=gsl_matrix_submatrix (B, 0, 0, d_size, c_size);
-	gsl_matrix_view xHi_all_sub2=gsl_matrix_submatrix (xHi_all, 0, 0, d_size*c_size, d_size*n_size);
+	gsl_matrix_view xHi_all_sub2=
+	  gsl_matrix_submatrix (xHi_all, 0, 0, d_size*c_size, d_size*n_size);
 
 	gsl_matrix_transpose_memcpy (Y, UtY);
 
-	gsl_matrix_view X_sub0=gsl_matrix_submatrix (X, 0, 0, c_size-2, n_size);
+	gsl_matrix_view X_sub0=gsl_matrix_submatrix(X,0,0,c_size-2,n_size);
 	gsl_matrix_transpose_memcpy (&X_sub0.matrix, UtW);
 	gsl_vector_view X_row0=gsl_matrix_row(X, c_size-2);
 	gsl_blas_dgemv (CblasTrans, 1.0, U, env, 0.0, &X_row0.vector);
@@ -4508,30 +4550,37 @@ void MVLMM::AnalyzeBimbamGXE (const gsl_matrix *U, const gsl_vector *eval, const
 	gsl_vector_view B_col2=gsl_matrix_column(B, c_size);
 	gsl_vector_set_zero(&B_col2.vector);
 
-	MphInitial(em_iter, em_prec, nr_iter, nr_prec, eval, &X_sub1.matrix, Y, l_min, l_max, n_region, V_g, V_e, &B_sub1.matrix);
-	logl_H0=MphEM ('R', em_iter, em_prec, eval, &X_sub1.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub1.matrix);
-	logl_H0=MphNR ('R', nr_iter, nr_prec, eval, &X_sub1.matrix, Y, Hi_all, &xHi_all_sub1.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-	MphCalcBeta (eval, &X_sub1.matrix, Y, V_g, V_e, UltVehiY, &B_sub1.matrix, se_B_null1);
+	MphInitial(em_iter, em_prec, nr_iter, nr_prec, eval, &X_sub1.matrix, 
+		   Y, l_min, l_max, n_region, V_g, V_e, &B_sub1.matrix);
+	logl_H0=MphEM ('R', em_iter, em_prec, eval, &X_sub1.matrix, Y, 
+		       U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, 
+		       UltVehiU, UltVehiE, V_g, V_e, &B_sub1.matrix);
+	logl_H0=MphNR ('R', nr_iter, nr_prec, eval, &X_sub1.matrix, Y, 
+		       Hi_all, &xHi_all_sub1.matrix, Hiy_all, V_g, V_e, 
+		       Hessian, crt_a, crt_b, crt_c);
+	MphCalcBeta (eval, &X_sub1.matrix, Y, V_g, V_e, UltVehiY, 
+		     &B_sub1.matrix, se_B_null1);
 
 	c=0;
 	Vg_remle_null.clear();
 	Ve_remle_null.clear();
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			Vg_remle_null.push_back(gsl_matrix_get (V_g, i, j) );
-			Ve_remle_null.push_back(gsl_matrix_get (V_e, i, j) );
-			VVg_remle_null.push_back(gsl_matrix_get (Hessian, c, c) );
-			VVe_remle_null.push_back(gsl_matrix_get (Hessian, c+v_size, c+v_size) );
-			c++;
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    Vg_remle_null.push_back(gsl_matrix_get (V_g, i, j) );
+	    Ve_remle_null.push_back(gsl_matrix_get (V_e, i, j) );
+	    VVg_remle_null.push_back(gsl_matrix_get (Hessian, c, c) );
+	    VVe_remle_null.push_back(gsl_matrix_get(Hessian,c+v_size,
+						    c+v_size));
+	    c++;
+	  }
 	}
 	beta_remle_null.clear();
 	se_beta_remle_null.clear();
 	for (size_t i=0; i<se_B_null1->size1; i++) {
-		for (size_t j=0; j<se_B_null1->size2; j++) {
-			beta_remle_null.push_back(gsl_matrix_get(B, i, j) );
-			se_beta_remle_null.push_back(gsl_matrix_get(se_B_null1, i, j) );
-		}
+	  for (size_t j=0; j<se_B_null1->size2; j++) {
+	    beta_remle_null.push_back(gsl_matrix_get(B, i, j) );
+	    se_beta_remle_null.push_back(gsl_matrix_get(se_B_null1, i, j) );
+	  }
 	}
 	logl_remle_H0=logl_H0;
 
@@ -4540,157 +4589,164 @@ void MVLMM::AnalyzeBimbamGXE (const gsl_matrix *U, const gsl_vector *eval, const
 
 	cout<<"REMLE estimate for Vg in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_g, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_g, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Vg): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"REMLE estimate for Ve in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_e, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_e, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Ve): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"REMLE likelihood = "<<logl_H0<<endl;
-
-
-	logl_H0=MphEM ('L', em_iter, em_prec, eval, &X_sub1.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub1.matrix);
-	logl_H0=MphNR ('L', nr_iter, nr_prec, eval, &X_sub1.matrix, Y, Hi_all, &xHi_all_sub1.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-	MphCalcBeta (eval, &X_sub1.matrix, Y, V_g, V_e, UltVehiY, &B_sub1.matrix, se_B_null1);
+	
+	logl_H0=MphEM ('L', em_iter, em_prec, eval, &X_sub1.matrix, Y, U_hat, 
+		       E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, 
+		       UltVehiE, V_g, V_e, &B_sub1.matrix);
+	logl_H0=MphNR ('L', nr_iter, nr_prec, eval, &X_sub1.matrix, Y, 
+		       Hi_all, &xHi_all_sub1.matrix, Hiy_all, V_g, V_e, 
+		       Hessian, crt_a, crt_b, crt_c);
+	MphCalcBeta (eval, &X_sub1.matrix, Y, V_g, V_e, UltVehiY, 
+		     &B_sub1.matrix, se_B_null1);
 
 	c=0;
 	Vg_mle_null.clear();
 	Ve_mle_null.clear();
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			Vg_mle_null.push_back(gsl_matrix_get (V_g, i, j) );
-			Ve_mle_null.push_back(gsl_matrix_get (V_e, i, j) );
-			VVg_mle_null.push_back(gsl_matrix_get (Hessian, c, c) );
-			VVe_mle_null.push_back(gsl_matrix_get (Hessian, c+v_size, c+v_size) );
-			c++;
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    Vg_mle_null.push_back(gsl_matrix_get (V_g, i, j) );
+	    Ve_mle_null.push_back(gsl_matrix_get (V_e, i, j) );
+	    VVg_mle_null.push_back(gsl_matrix_get (Hessian, c, c) );
+	    VVe_mle_null.push_back(gsl_matrix_get(Hessian,c+v_size,c+v_size));
+	    c++;
+	  }
 	}
 	beta_mle_null.clear();
 	se_beta_mle_null.clear();
 	for (size_t i=0; i<se_B_null1->size1; i++) {
-		for (size_t j=0; j<se_B_null1->size2; j++) {
-			beta_mle_null.push_back(gsl_matrix_get(B, i, j) );
-			se_beta_mle_null.push_back(gsl_matrix_get(se_B_null1, i, j) );
-		}
+	  for (size_t j=0; j<se_B_null1->size2; j++) {
+	    beta_mle_null.push_back(gsl_matrix_get(B, i, j) );
+	    se_beta_mle_null.push_back(gsl_matrix_get(se_B_null1, i, j) );
+	  }
 	}
 	logl_mle_H0=logl_H0;
 
 	cout<<"MLE estimate for Vg in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_g, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_g, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Vg): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"MLE estimate for Ve in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_e, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_e, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Ve): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"MLE likelihood = "<<logl_H0<<endl;
-
-
+	
 	vector<double> v_beta, v_Vg, v_Ve, v_Vbeta;
 	for (size_t i=0; i<d_size; i++) {
-		v_beta.push_back(0.0);
+	  v_beta.push_back(0.0);
 	}
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			v_Vg.push_back(0.0);
-			v_Ve.push_back(0.0);
-			v_Vbeta.push_back(0.0);
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    v_Vg.push_back(0.0);
+	    v_Ve.push_back(0.0);
+	    v_Vbeta.push_back(0.0);
+	  }
 	}
 
 	gsl_matrix_memcpy (V_g_null, V_g);
 	gsl_matrix_memcpy (V_e_null, V_e);
 	gsl_matrix_memcpy (B_null, B);
 
-	//start reading genotypes and analyze
+	// Start reading genotypes and analyze.
 	for (size_t t=0; t<indicator_snp.size(); ++t) {
-		//if (t>=1) {break;}
-		!safeGetline(infile, line).eof();
-		if (t%d_pace==0 || t==(ns_total-1)) {ProgressBar ("Reading SNPs  ", t, ns_total-1);}
-		if (indicator_snp[t]==0) {continue;}
-
-		ch_ptr=strtok ((char *)line.c_str(), " , \t");
-		ch_ptr=strtok (NULL, " , \t");
-		ch_ptr=strtok (NULL, " , \t");
-
-		x_mean=0.0; c_phen=0; n_miss=0;
-		gsl_vector_set_zero(x_miss);
-		for (size_t i=0; i<ni_total; ++i) {
-			ch_ptr=strtok (NULL, " , \t");
-			if (indicator_idv[i]==0) {continue;}
-
-			if (strcmp(ch_ptr, "NA")==0) {gsl_vector_set(x_miss, c_phen, 0.0); n_miss++;}
-			else {
-				geno=atof(ch_ptr);
-
-				gsl_vector_set(x, c_phen, geno);
-				gsl_vector_set(x_miss, c_phen, 1.0);
-				x_mean+=geno;
-			}
-			c_phen++;
-		}
-
-		x_mean/=(double)(ni_test-n_miss);
-
-		for (size_t i=0; i<ni_test; ++i) {
-			if (gsl_vector_get (x_miss, i)==0) {gsl_vector_set(x, i, x_mean);}
-			geno=gsl_vector_get(x, i);
-			if (x_mean>1) {
-				gsl_vector_set(x, i, 2-geno);
-			}
-		}
-
-		//calculate statistics
-		time_start=clock();
-		gsl_blas_dgemv (CblasTrans, 1.0, U, x, 0.0, &X_row1.vector);
-		gsl_vector_mul (x, env);
-		gsl_blas_dgemv (CblasTrans, 1.0, U, x, 0.0, &X_row2.vector);
-		time_UtX+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
-
+	  !safeGetline(infile, line).eof();
+	  if (t%d_pace==0 || t==(ns_total-1)) {
+	    ProgressBar ("Reading SNPs  ", t, ns_total-1);
+	  }
+	  if (indicator_snp[t]==0) {continue;}
+	  
+	  ch_ptr=strtok ((char *)line.c_str(), " , \t");
+	  ch_ptr=strtok (NULL, " , \t");
+	  ch_ptr=strtok (NULL, " , \t");
+	  
+	  x_mean=0.0; c_phen=0; n_miss=0;
+	  gsl_vector_set_zero(x_miss);
+	  for (size_t i=0; i<ni_total; ++i) {
+	    ch_ptr=strtok (NULL, " , \t");
+	    if (indicator_idv[i]==0) {continue;}
+	    
+	    if (strcmp(ch_ptr, "NA")==0) {
+	      gsl_vector_set(x_miss, c_phen, 0.0); 
+	      n_miss++;
+	    }
+	    else {
+	      geno=atof(ch_ptr);
+	      
+	      gsl_vector_set(x, c_phen, geno);
+	      gsl_vector_set(x_miss, c_phen, 1.0);
+	      x_mean+=geno;
+	    }
+	    c_phen++;
+	  }
+	  
+	  x_mean/=(double)(ni_test-n_miss);
+	  
+	  for (size_t i=0; i<ni_test; ++i) {
+	    if (gsl_vector_get (x_miss, i)==0) {gsl_vector_set(x, i, x_mean);}
+	    geno=gsl_vector_get(x, i);
+	    if (x_mean>1) {
+	      gsl_vector_set(x, i, 2-geno);
+	    }
+	  }
+	  
+	  // Calculate statistics.
+	  time_start=clock();
+	  gsl_blas_dgemv (CblasTrans, 1.0, U, x, 0.0, &X_row1.vector);
+	  gsl_vector_mul (x, env);
+	  gsl_blas_dgemv (CblasTrans, 1.0, U, x, 0.0, &X_row2.vector);
+	  time_UtX+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
+	  
 		//initial values
 		gsl_matrix_memcpy (V_g, V_g_null);
 		gsl_matrix_memcpy (V_e, V_e_null);
@@ -4698,85 +4754,116 @@ void MVLMM::AnalyzeBimbamGXE (const gsl_matrix *U, const gsl_vector *eval, const
 
 		if (a_mode==2 || a_mode==3 || a_mode==4) {
 		  if (a_mode==3 || a_mode==4) {
-		    logl_H0=MphEM ('R', em_iter/10, em_prec*10, eval, &X_sub2.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub2.matrix);
-		    logl_H0=MphNR ('R', nr_iter/10, nr_prec*10, eval, &X_sub2.matrix, Y, Hi_all, &xHi_all_sub2.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-		    MphCalcBeta (eval, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, &B_sub2.matrix, se_B_null2);
+		    logl_H0=MphEM ('R', em_iter/10, em_prec*10, eval, 
+				   &X_sub2.matrix, Y, U_hat, E_hat, OmegaU, 
+				   OmegaE, UltVehiY, UltVehiBX, UltVehiU, 
+				   UltVehiE, V_g, V_e, &B_sub2.matrix);
+		    logl_H0=MphNR ('R', nr_iter/10, nr_prec*10, eval, 
+				   &X_sub2.matrix, Y, Hi_all, 
+				   &xHi_all_sub2.matrix, Hiy_all, V_g, V_e, 
+				   Hessian, crt_a, crt_b, crt_c);
+		    MphCalcBeta (eval, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, 
+				 &B_sub2.matrix, se_B_null2);
 		  }
 
 		  if (a_mode==2 || a_mode==4) {
-		    logl_H0=MphEM ('L', em_iter/10, em_prec*10, eval, &X_sub2.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub2.matrix);
-		    logl_H0=MphNR ('L', nr_iter/10, nr_prec*10, eval, &X_sub2.matrix, Y, Hi_all, &xHi_all_sub2.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-		    MphCalcBeta (eval, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, &B_sub2.matrix, se_B_null2);
+		    logl_H0=MphEM ('L', em_iter/10, em_prec*10, eval, 
+				   &X_sub2.matrix, Y, U_hat, E_hat, OmegaU, 
+				   OmegaE, UltVehiY, UltVehiBX, UltVehiU, 
+				   UltVehiE, V_g, V_e, &B_sub2.matrix);
+		    logl_H0=MphNR ('L', nr_iter/10, nr_prec*10, eval, 
+				   &X_sub2.matrix, Y, Hi_all, 
+				   &xHi_all_sub2.matrix, Hiy_all, V_g, V_e, 
+				   Hessian, crt_a, crt_b, crt_c);
+		    MphCalcBeta (eval, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, 
+				 &B_sub2.matrix, se_B_null2);
 		  }
 		}
 
-
 		time_start=clock();
 
-		//3 is before 1
+		// 3 is before 1.
 		if (a_mode==3 || a_mode==4) {
-			p_score=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g_null, V_e_null, UltVehiY, beta, Vbeta);
-			if (p_score<p_nr && crt==1) {
-				logl_H1=MphNR ('R', 1, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-				p_score=PCRT (3, d_size, p_score, crt_a, crt_b, crt_c);
-			}
+		  p_score=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, 
+				    V_g_null, V_e_null, UltVehiY, beta, Vbeta);
+		  if (p_score<p_nr && crt==1) {
+		    logl_H1=MphNR ('R', 1, nr_prec*10, eval, X, Y, Hi_all, 
+				   xHi_all, Hiy_all, V_g, V_e, Hessian, 
+				   crt_a, crt_b, crt_c);
+		    p_score=PCRT (3, d_size, p_score, crt_a, crt_b, crt_c);
+		  }
 		}
-
+		
 		if (a_mode==2 || a_mode==4) {
-			logl_H1=MphEM ('L', em_iter/10, em_prec*10, eval, X, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
-			//calculate beta and Vbeta
-			p_lrt=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-			p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
-
-			if (p_lrt<p_nr) {
-				logl_H1=MphNR ('L', nr_iter/10, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-				//calculate beta and Vbeta
-				p_lrt=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-				p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
-
-				if (crt==1) {
-					p_lrt=PCRT (2, d_size, p_lrt, crt_a, crt_b, crt_c);
-				}
-			}
-		}
+		  logl_H1=MphEM ('L', em_iter/10, em_prec*10, eval, X, Y, 
+				 U_hat, E_hat, OmegaU, OmegaE, UltVehiY, 
+				 UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
 
+		  // Calculate beta and Vbeta.
+		  p_lrt=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, 
+				  V_g, V_e, UltVehiY, beta, Vbeta);
+		  p_lrt=gsl_cdf_chisq_Q(2.0*(logl_H1-logl_H0),(double)d_size);
+		  
+		  if (p_lrt<p_nr) {
+		    logl_H1=MphNR ('L', nr_iter/10, nr_prec*10, eval, X, Y, 
+				   Hi_all, xHi_all, Hiy_all, V_g, V_e, 
+				   Hessian, crt_a, crt_b, crt_c);
+		    
+		    // Calculate beta and Vbeta.
+		    p_lrt=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, 
+				    V_g, V_e, UltVehiY, beta, Vbeta);
+		    p_lrt=gsl_cdf_chisq_Q(2.0*(logl_H1-logl_H0),
+					  (double)d_size );
+		    
+		    if (crt==1) {
+		      p_lrt=PCRT (2, d_size, p_lrt, crt_a, crt_b, crt_c);
+		    }
+		  }
+		}
+		
 		if (a_mode==1 || a_mode==4) {
-			logl_H1=MphEM ('R', em_iter/10, em_prec*10, eval, X, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
-			p_wald=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-
-			if (p_wald<p_nr) {
-				logl_H1=MphNR ('R', nr_iter/10, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-				p_wald=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-
-				if (crt==1) {
-					p_wald=PCRT (1, d_size, p_wald, crt_a, crt_b, crt_c);
-				}
-			}
+		  logl_H1=MphEM ('R', em_iter/10, em_prec*10, eval, X, Y, 
+				 U_hat, E_hat, OmegaU, OmegaE, UltVehiY, 
+				 UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
+		  p_wald=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, 
+				   V_g, V_e, UltVehiY, beta, Vbeta);
+		  
+		  if (p_wald<p_nr) {
+		    logl_H1=MphNR ('R', nr_iter/10, nr_prec*10, eval, X, Y, 
+				   Hi_all, xHi_all, Hiy_all, V_g, V_e, 
+				   Hessian, crt_a, crt_b, crt_c);
+		    p_wald=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, 
+				     V_g, V_e, UltVehiY, beta, Vbeta);
+		    
+		    if (crt==1) {
+		      p_wald=PCRT (1, d_size, p_wald, crt_a, crt_b, crt_c);
+		    }
+		  }
 		}
 
 		if (x_mean>1) {gsl_vector_scale(beta, -1.0);}
 
 		time_opt+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
 
-		//store summary data
-		//SUMSTAT SNPs={snpInfo[t].get_chr(), snpInfo[t].get_rs(), snpInfo[t].get_pos(), n_miss, beta, se, lambda_remle, lambda_mle, p_wald, p_lrt, p_score};
+		// Store summary data.
 		for (size_t i=0; i<d_size; i++) {
-			v_beta[i]=gsl_vector_get (beta, i);
+		  v_beta[i]=gsl_vector_get (beta, i);
 		}
 
 		c=0;
 		for (size_t i=0; i<d_size; i++) {
-			for (size_t j=i; j<d_size; j++) {
-				v_Vg[c]=gsl_matrix_get (V_g, i, j);
-				v_Ve[c]=gsl_matrix_get (V_e, i, j);
-				v_Vbeta[c]=gsl_matrix_get (Vbeta, i, j);
-				c++;
-			}
+		  for (size_t j=i; j<d_size; j++) {
+		    v_Vg[c]=gsl_matrix_get (V_g, i, j);
+		    v_Ve[c]=gsl_matrix_get (V_e, i, j);
+		    v_Vbeta[c]=gsl_matrix_get (Vbeta, i, j);
+		    c++;
+		  }
 		}
 
-		MPHSUMSTAT SNPs={v_beta, p_wald, p_lrt, p_score, v_Vg, v_Ve, v_Vbeta};
+		MPHSUMSTAT SNPs={v_beta, p_wald, p_lrt, p_score, v_Vg, 
+				 v_Ve, v_Vbeta};
 		sumStat.push_back(SNPs);
-    }
+	}
 	cout<<endl;
 
 
@@ -4817,17 +4904,15 @@ void MVLMM::AnalyzeBimbamGXE (const gsl_matrix *U, const gsl_vector *eval, const
 	return;
 }
 
-
-
-
-
-
-
-void MVLMM::AnalyzePlinkGXE (const gsl_matrix *U, const gsl_vector *eval, const gsl_matrix *UtW, const gsl_matrix *UtY, const gsl_vector *env)
-{
+void MVLMM::AnalyzePlinkGXE (const gsl_matrix *U, const gsl_vector *eval, 
+			     const gsl_matrix *UtW, const gsl_matrix *UtY, 
+			     const gsl_vector *env) {
 	string file_bed=file_bfile+".bed";
 	ifstream infile (file_bed.c_str(), ios::binary);
-	if (!infile) {cout<<"error reading bed file:"<<file_bed<<endl; return;}
+	if (!infile) {
+	  cout<<"error reading bed file:"<<file_bed<<endl; 
+	  return;
+	}
 
 	clock_t time_start=clock();
 	time_UtX=0; time_opt=0;
@@ -4835,17 +4920,15 @@ void MVLMM::AnalyzePlinkGXE (const gsl_matrix *U, const gsl_vector *eval, const
 	char ch[1];
 	bitset<8> b;
 
-	//	double lambda_mle=0, lambda_remle=0, beta=0, se=0, ;
 	double logl_H0=0.0, logl_H1=0.0, p_wald=0, p_lrt=0, p_score=0;
 	double crt_a, crt_b, crt_c;
 	int n_bit, n_miss, ci_total, ci_test;
 	double geno, x_mean;
 	size_t c=0;
-	//	double s=0.0;
 	size_t n_size=UtY->size1, d_size=UtY->size2, c_size=UtW->size2+2;
 	size_t dc_size=d_size*(c_size+1), v_size=d_size*(d_size+1)/2;
 
-	//large matrices for EM
+	// Large matrices for EM.
 	gsl_matrix *U_hat=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *E_hat=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *OmegaU=gsl_matrix_alloc (d_size, n_size);
@@ -4855,10 +4938,15 @@ void MVLMM::AnalyzePlinkGXE (const gsl_matrix *U, const gsl_vector *eval, const
 	gsl_matrix *UltVehiU=gsl_matrix_alloc (d_size, n_size);
 	gsl_matrix *UltVehiE=gsl_matrix_alloc (d_size, n_size);
 
-	//large matrices for NR
-	gsl_matrix *Hi_all=gsl_matrix_alloc (d_size, d_size*n_size);		//each dxd block is H_k^{-1}
-	gsl_matrix *Hiy_all=gsl_matrix_alloc (d_size, n_size);				//each column is H_k^{-1}y_k
-	gsl_matrix *xHi_all=gsl_matrix_alloc (dc_size, d_size*n_size);		//each dcxdc block is x_k\otimes H_k^{-1}
+	// Large matrices for NR.
+	// Each dxd block is H_k^{-1}.
+	gsl_matrix *Hi_all=gsl_matrix_alloc (d_size, d_size*n_size);
+	
+	// Each column is H_k^{-1}y_k
+	gsl_matrix *Hiy_all=gsl_matrix_alloc (d_size, n_size);
+	
+	// Each dcxdc block is x_k\otimes H_k^{-1}.
+	gsl_matrix *xHi_all=gsl_matrix_alloc (dc_size, d_size*n_size);	
 	gsl_matrix *Hessian=gsl_matrix_alloc (v_size*2, v_size*2);
 
 	gsl_vector *x=gsl_vector_alloc (n_size);
@@ -4871,24 +4959,26 @@ void MVLMM::AnalyzePlinkGXE (const gsl_matrix *U, const gsl_vector *eval, const
 	gsl_vector *beta=gsl_vector_alloc (d_size);
 	gsl_matrix *Vbeta=gsl_matrix_alloc (d_size, d_size);
 
-	//null estimates for initial values
+	// Null estimates for initial values.
 	gsl_matrix *V_g_null=gsl_matrix_alloc (d_size, d_size);
 	gsl_matrix *V_e_null=gsl_matrix_alloc (d_size, d_size);
 	gsl_matrix *B_null=gsl_matrix_alloc (d_size, c_size+1);
 	gsl_matrix *se_B_null1=gsl_matrix_alloc (d_size, c_size-1);
 	gsl_matrix *se_B_null2=gsl_matrix_alloc (d_size, c_size);
 
-	gsl_matrix_view X_sub1=gsl_matrix_submatrix (X, 0, 0, c_size-1, n_size);
-	gsl_matrix_view B_sub1=gsl_matrix_submatrix (B, 0, 0, d_size, c_size-1);
-	gsl_matrix_view xHi_all_sub1=gsl_matrix_submatrix (xHi_all, 0, 0, d_size*(c_size-1), d_size*n_size);
+	gsl_matrix_view X_sub1=gsl_matrix_submatrix(X,0,0,c_size-1,n_size);
+	gsl_matrix_view B_sub1=gsl_matrix_submatrix(B,0,0,d_size,c_size-1);
+	gsl_matrix_view xHi_all_sub1=
+	  gsl_matrix_submatrix(xHi_all,0,0,d_size*(c_size-1),d_size*n_size);
 
 	gsl_matrix_view X_sub2=gsl_matrix_submatrix (X, 0, 0, c_size, n_size);
 	gsl_matrix_view B_sub2=gsl_matrix_submatrix (B, 0, 0, d_size, c_size);
-	gsl_matrix_view xHi_all_sub2=gsl_matrix_submatrix (xHi_all, 0, 0, d_size*c_size, d_size*n_size);
+	gsl_matrix_view xHi_all_sub2=
+	  gsl_matrix_submatrix (xHi_all, 0, 0, d_size*c_size, d_size*n_size);
 
 	gsl_matrix_transpose_memcpy (Y, UtY);
 
-	gsl_matrix_view X_sub0=gsl_matrix_submatrix (X, 0, 0, c_size-2, n_size);
+	gsl_matrix_view X_sub0=gsl_matrix_submatrix(X,0,0,c_size-2,n_size);
 	gsl_matrix_transpose_memcpy (&X_sub0.matrix, UtW);
 	gsl_vector_view X_row0=gsl_matrix_row(X, c_size-2);
 	gsl_blas_dgemv (CblasTrans, 1.0, U, env, 0.0, &X_row0.vector);
@@ -4903,33 +4993,38 @@ void MVLMM::AnalyzePlinkGXE (const gsl_matrix *U, const gsl_vector *eval, const
 	gsl_vector_view B_col2=gsl_matrix_column(B, c_size);
 	gsl_vector_set_zero(&B_col2.vector);
 
-	//time_start=clock();
-	MphInitial(em_iter, em_prec, nr_iter, nr_prec, eval, &X_sub1.matrix, Y, l_min, l_max, n_region, V_g, V_e, &B_sub1.matrix);
+	MphInitial(em_iter, em_prec, nr_iter, nr_prec, eval, &X_sub1.matrix, 
+		   Y, l_min, l_max, n_region, V_g, V_e, &B_sub1.matrix);
 
-	logl_H0=MphEM ('R', em_iter, em_prec, eval, &X_sub1.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub1.matrix);
-	logl_H0=MphNR ('R', nr_iter, nr_prec, eval, &X_sub1.matrix, Y, Hi_all, &xHi_all_sub1.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-	MphCalcBeta (eval, &X_sub1.matrix, Y, V_g, V_e, UltVehiY, &B_sub1.matrix, se_B_null1);
-	//cout<<"time for REML in the null = "<<(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0)<<endl;
+	logl_H0=MphEM ('R', em_iter, em_prec, eval, &X_sub1.matrix, Y, U_hat, 
+		       E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, 
+		       UltVehiE, V_g, V_e, &B_sub1.matrix);
+	logl_H0=MphNR ('R', nr_iter, nr_prec, eval, &X_sub1.matrix, Y, 
+		       Hi_all, &xHi_all_sub1.matrix, Hiy_all, V_g, V_e, 
+		       Hessian, crt_a, crt_b, crt_c);
+	MphCalcBeta (eval, &X_sub1.matrix, Y, V_g, V_e, UltVehiY, 
+		     &B_sub1.matrix, se_B_null1);
 
 	c=0;
 	Vg_remle_null.clear();
 	Ve_remle_null.clear();
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			Vg_remle_null.push_back(gsl_matrix_get (V_g, i, j) );
-			Ve_remle_null.push_back(gsl_matrix_get (V_e, i, j) );
-			VVg_remle_null.push_back(gsl_matrix_get (Hessian, c, c) );
-			VVe_remle_null.push_back(gsl_matrix_get (Hessian, c+v_size, c+v_size) );
-			c++;
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    Vg_remle_null.push_back(gsl_matrix_get (V_g, i, j) );
+	    Ve_remle_null.push_back(gsl_matrix_get (V_e, i, j) );
+	    VVg_remle_null.push_back(gsl_matrix_get (Hessian, c, c) );
+	    VVe_remle_null.push_back(gsl_matrix_get(Hessian,c+v_size,
+						    c+v_size));
+	    c++;
+	  }
 	}
 	beta_remle_null.clear();
 	se_beta_remle_null.clear();
 	for (size_t i=0; i<se_B_null1->size1; i++) {
-		for (size_t j=0; j<se_B_null1->size2; j++) {
-			beta_remle_null.push_back(gsl_matrix_get(B, i, j) );
-			se_beta_remle_null.push_back(gsl_matrix_get(se_B_null1, i, j) );
-		}
+	  for (size_t j=0; j<se_B_null1->size2; j++) {
+	    beta_remle_null.push_back(gsl_matrix_get(B, i, j) );
+	    se_beta_remle_null.push_back(gsl_matrix_get(se_B_null1, i, j) );
+	  }
 	}
 	logl_remle_H0=logl_H0;
 
@@ -4937,279 +5032,293 @@ void MVLMM::AnalyzePlinkGXE (const gsl_matrix *U, const gsl_vector *eval, const
 	cout.precision(4);
 	cout<<"REMLE estimate for Vg in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_g, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_g, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Vg): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"REMLE estimate for Ve in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_e, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_e, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Ve): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"REMLE likelihood = "<<logl_H0<<endl;
 
-	//time_start=clock();
-	logl_H0=MphEM ('L', em_iter, em_prec, eval, &X_sub1.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub1.matrix);
-	logl_H0=MphNR ('L', nr_iter, nr_prec, eval, &X_sub1.matrix, Y, Hi_all, &xHi_all_sub1.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-	MphCalcBeta (eval, &X_sub1.matrix, Y, V_g, V_e, UltVehiY, &B_sub1.matrix, se_B_null1);
-	//cout<<"time for MLE in the null = "<<(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0)<<endl;
+	logl_H0=MphEM ('L', em_iter, em_prec, eval, &X_sub1.matrix, Y, 
+		       U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, 
+		       UltVehiU, UltVehiE, V_g, V_e, &B_sub1.matrix);
+	logl_H0=MphNR ('L', nr_iter, nr_prec, eval, &X_sub1.matrix, Y, 
+		       Hi_all, &xHi_all_sub1.matrix, Hiy_all, V_g, V_e, 
+		       Hessian, crt_a, crt_b, crt_c);
+	MphCalcBeta (eval, &X_sub1.matrix, Y, V_g, V_e, UltVehiY, 
+		     &B_sub1.matrix, se_B_null1);
 
 	c=0;
 	Vg_mle_null.clear();
 	Ve_mle_null.clear();
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			Vg_mle_null.push_back(gsl_matrix_get (V_g, i, j) );
-			Ve_mle_null.push_back(gsl_matrix_get (V_e, i, j) );
-			VVg_mle_null.push_back(gsl_matrix_get (Hessian, c, c) );
-			VVe_mle_null.push_back(gsl_matrix_get (Hessian, c+v_size, c+v_size) );
-			c++;
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    Vg_mle_null.push_back(gsl_matrix_get (V_g, i, j) );
+	    Ve_mle_null.push_back(gsl_matrix_get (V_e, i, j) );
+	    VVg_mle_null.push_back(gsl_matrix_get (Hessian, c, c) );
+	    VVe_mle_null.push_back(gsl_matrix_get(Hessian,c+v_size,c+v_size));
+	    c++;
+	  }
 	}
 	beta_mle_null.clear();
 	se_beta_mle_null.clear();
 	for (size_t i=0; i<se_B_null1->size1; i++) {
-		for (size_t j=0; j<se_B_null1->size2; j++) {
-			beta_mle_null.push_back(gsl_matrix_get(B, i, j) );
-			se_beta_mle_null.push_back(gsl_matrix_get(se_B_null1, i, j) );
-		}
+	  for (size_t j=0; j<se_B_null1->size2; j++) {
+	    beta_mle_null.push_back(gsl_matrix_get(B, i, j) );
+	    se_beta_mle_null.push_back(gsl_matrix_get(se_B_null1, i, j) );
+	  }
 	}
 	logl_mle_H0=logl_H0;
 
 	cout<<"MLE estimate for Vg in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_g, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_g, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Vg): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c, c))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"MLE estimate for Ve in the null model: "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			cout<<gsl_matrix_get(V_e, i, j)<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    cout<<gsl_matrix_get(V_e, i, j)<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"se(Ve): "<<endl;
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=0; j<=i; j++) {
-			c=GetIndex(i, j, d_size);
-			cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
-		}
-		cout<<endl;
+	  for (size_t j=0; j<=i; j++) {
+	    c=GetIndex(i, j, d_size);
+	    cout<<sqrt(gsl_matrix_get(Hessian, c+v_size, c+v_size))<<"\t";
+	  }
+	  cout<<endl;
 	}
 	cout<<"MLE likelihood = "<<logl_H0<<endl;
 
 	vector<double> v_beta, v_Vg, v_Ve, v_Vbeta;
 	for (size_t i=0; i<d_size; i++) {
-		v_beta.push_back(0.0);
+	  v_beta.push_back(0.0);
 	}
 	for (size_t i=0; i<d_size; i++) {
-		for (size_t j=i; j<d_size; j++) {
-			v_Vg.push_back(0.0);
-			v_Ve.push_back(0.0);
-			v_Vbeta.push_back(0.0);
-		}
+	  for (size_t j=i; j<d_size; j++) {
+	    v_Vg.push_back(0.0);
+	    v_Ve.push_back(0.0);
+	    v_Vbeta.push_back(0.0);
+	  }
 	}
 
 	gsl_matrix_memcpy (V_g_null, V_g);
 	gsl_matrix_memcpy (V_e_null, V_e);
 	gsl_matrix_memcpy (B_null, B);
 
-
-	//start reading genotypes and analyze
-
-	//calculate n_bit and c, the number of bit for each snp
+	// Start reading genotypes and analyze.
+	// Calculate n_bit and c, the number of bit for each SNP.
 	if (ni_total%4==0) {n_bit=ni_total/4;}
 	else {n_bit=ni_total/4+1; }
 
-	//print the first three majic numbers
+	// Print the first three magic numbers.
 	for (int i=0; i<3; ++i) {
-		infile.read(ch,1);
-		b=ch[0];
+	  infile.read(ch,1);
+	  b=ch[0];
 	}
 
 	for (vector<SNPINFO>::size_type t=0; t<snpInfo.size(); ++t) {
-		if (t%d_pace==0 || t==snpInfo.size()-1) {ProgressBar ("Reading SNPs  ", t, snpInfo.size()-1);}
-		if (indicator_snp[t]==0) {continue;}
-
-		//if (t>=0) {break;}
-		//if (snpInfo[t].rs_number!="MAG18140902") {continue;}
-		//cout<<t<<endl;
-
-		infile.seekg(t*n_bit+3);		//n_bit, and 3 is the number of magic numbers
-
-		//read genotypes
-		x_mean=0.0;	n_miss=0; ci_total=0; ci_test=0;
-		for (int i=0; i<n_bit; ++i) {
-			infile.read(ch,1);
-			b=ch[0];
-			for (size_t j=0; j<4; ++j) {                //minor allele homozygous: 2.0; major: 0.0;
-				if ((i==(n_bit-1)) && ci_total==(int)ni_total) {break;}
-				if (indicator_idv[ci_total]==0) {ci_total++; continue;}
-
-				if (b[2*j]==0) {
-					if (b[2*j+1]==0) {gsl_vector_set(x, ci_test, 2); x_mean+=2.0; }
-					else {gsl_vector_set(x, ci_test, 1); x_mean+=1.0; }
-				}
-				else {
-					if (b[2*j+1]==1) {gsl_vector_set(x, ci_test, 0); }
-					else {gsl_vector_set(x, ci_test, -9); n_miss++; }
-				}
-
-				ci_total++;
-				ci_test++;
-			}
-		}
-
-		x_mean/=(double)(ni_test-n_miss);
-
-		for (size_t i=0; i<ni_test; ++i) {
-			geno=gsl_vector_get(x,i);
-			if (geno==-9) {gsl_vector_set(x, i, x_mean); geno=x_mean;}
-			if (x_mean>1) {
-				gsl_vector_set(x, i, 2-geno);
-			}
-		}
-
-		/*
-		if (t==0) {
-			ofstream outfile ("./snp1.txt", ofstream::out);
-			if (!outfile) {cout<<"error writing file: "<<endl; return;}
-			for (size_t i=0; i<x->size; i++) {
-				outfile<<gsl_vector_get(x, i)<<endl;
-			}
-			outfile.clear();
-			outfile.close();
-		}
-		*/
-
-		//calculate statistics
-		time_start=clock();
-		gsl_blas_dgemv (CblasTrans, 1.0, U, x, 0.0, &X_row1.vector);
-		gsl_vector_mul (x, env);
-		gsl_blas_dgemv (CblasTrans, 1.0, U, x, 0.0, &X_row2.vector);
-		time_UtX+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
-
-		//initial values
-		gsl_matrix_memcpy (V_g, V_g_null);
-		gsl_matrix_memcpy (V_e, V_e_null);
-		gsl_matrix_memcpy (B, B_null);
-
-		if (a_mode==2 || a_mode==3 || a_mode==4) {
-		  if (a_mode==3 || a_mode==4) {
-		    logl_H0=MphEM ('R', em_iter/10, em_prec*10, eval, &X_sub2.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub2.matrix);
-		    logl_H0=MphNR ('R', nr_iter/10, nr_prec*10, eval, &X_sub2.matrix, Y, Hi_all, &xHi_all_sub2.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-		    MphCalcBeta (eval, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, &B_sub2.matrix, se_B_null2);
-		  }
-
-		  if (a_mode==2 || a_mode==4) {
-		    logl_H0=MphEM ('L', em_iter/10, em_prec*10, eval, &X_sub2.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, &B_sub2.matrix);
-		    logl_H0=MphNR ('L', nr_iter/10, nr_prec*10, eval, &X_sub2.matrix, Y, Hi_all, &xHi_all_sub2.matrix, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-		    MphCalcBeta (eval, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, &B_sub2.matrix, se_B_null2);
-		  }
-		}
-
-		time_start=clock();
-
-		//3 is before 1
-		if (a_mode==3 || a_mode==4) {
-			p_score=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g_null, V_e_null, UltVehiY, beta, Vbeta);
-
-			if (p_score<p_nr && crt==1) {
-				logl_H1=MphNR ('R', 1, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-				p_score=PCRT (3, d_size, p_score, crt_a, crt_b, crt_c);
-			}
-		}
-
-		if (a_mode==2 || a_mode==4) {
-			logl_H1=MphEM ('L', em_iter/10, em_prec*10, eval, X, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
-			//calculate beta and Vbeta
-			p_lrt=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-			p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
-
-			if (p_lrt<p_nr) {
-				logl_H1=MphNR ('L', nr_iter/10, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-
-				//calculate beta and Vbeta
-				p_lrt=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-				p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
-				if (crt==1) {
-					p_lrt=PCRT (2, d_size, p_lrt, crt_a, crt_b, crt_c);
-				}
-			}
-		}
-
-		if (a_mode==1 || a_mode==4) {
-			logl_H1=MphEM ('R', em_iter/10, em_prec*10, eval, X, Y, U_hat, E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, V_e, B);
-			p_wald=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-
-			if (p_wald<p_nr) {
-				logl_H1=MphNR ('R', nr_iter/10, nr_prec*10, eval, X, Y, Hi_all, xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
-				p_wald=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, beta, Vbeta);
-
-				if (crt==1) {
-					p_wald=PCRT (1, d_size, p_wald, crt_a, crt_b, crt_c);
-				}
-			}
-		}
-
-		//cout<<setprecision(10)<<p_wald<<"\t"<<p_lrt<<"\t"<<p_score<<endl;
-
-		if (x_mean>1) {gsl_vector_scale(beta, -1.0);}
+	  if (t%d_pace==0 || t==snpInfo.size()-1) {
+	    ProgressBar ("Reading SNPs  ", t, snpInfo.size()-1);
+	  }
+	  if (indicator_snp[t]==0) {continue;}
+	  
+	  // n_bit, and 3 is the number of magic numbers.
+	  infile.seekg(t*n_bit+3);
 
-		time_opt+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
+	  // Read genotypes.
+	  x_mean=0.0;	n_miss=0; ci_total=0; ci_test=0;
+	  for (int i=0; i<n_bit; ++i) {
+	    infile.read(ch,1);
+	    b=ch[0];
 
-		//store summary data
-		//SUMSTAT SNPs={snpInfo[t].get_chr(), snpInfo[t].get_rs(), snpInfo[t].get_pos(), n_miss, beta, se, lambda_remle, lambda_mle, p_wald, p_lrt, p_score};
-		for (size_t i=0; i<d_size; i++) {
-			v_beta[i]=gsl_vector_get (beta, i);
-		}
+	    // Minor allele homozygous: 2.0; major: 0.0.
+	    for (size_t j=0; j<4; ++j) {                
+	      
+	      if ((i==(n_bit-1)) && ci_total==(int)ni_total) {break;}
+	      if (indicator_idv[ci_total]==0) {ci_total++; continue;}
+	      
+	      if (b[2*j]==0) {
+		if (b[2*j+1]==0) {gsl_vector_set(x, ci_test, 2); x_mean+=2.0; }
+		else {gsl_vector_set(x, ci_test, 1); x_mean+=1.0; }
+	      }
+	      else {
+		if (b[2*j+1]==1) {gsl_vector_set(x, ci_test, 0); }
+		else {gsl_vector_set(x, ci_test, -9); n_miss++; }
+	      }
+	      
+	      ci_total++;
+	      ci_test++;
+	    }
+	  }
+	  
+	  x_mean/=(double)(ni_test-n_miss);
+	  
+	  for (size_t i=0; i<ni_test; ++i) {
+	    geno=gsl_vector_get(x,i);
+	    if (geno==-9) {gsl_vector_set(x, i, x_mean); geno=x_mean;}
+	    if (x_mean>1) {
+	      gsl_vector_set(x, i, 2-geno);
+	    }
+	  }
+	  
+	  // Calculate statistics.
+	  time_start=clock();
+	  gsl_blas_dgemv (CblasTrans, 1.0, U, x, 0.0, &X_row1.vector);
+	  gsl_vector_mul (x, env);
+	  gsl_blas_dgemv (CblasTrans, 1.0, U, x, 0.0, &X_row2.vector);
+	  time_UtX+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
+	  
+	  // Initial values.
+	  gsl_matrix_memcpy (V_g, V_g_null);
+	  gsl_matrix_memcpy (V_e, V_e_null);
+	  gsl_matrix_memcpy (B, B_null);
+	  
+	  if (a_mode==2 || a_mode==3 || a_mode==4) {
+	    if (a_mode==3 || a_mode==4) {
+	      logl_H0=MphEM ('R', em_iter/10, em_prec*10, eval, 
+			     &X_sub2.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, 
+			     UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, 
+			     V_e, &B_sub2.matrix);
+	      logl_H0=MphNR ('R', nr_iter/10, nr_prec*10, eval, 
+			     &X_sub2.matrix, Y, Hi_all, &xHi_all_sub2.matrix, 
+			     Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
+	      MphCalcBeta (eval, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, 
+			   &B_sub2.matrix, se_B_null2);
+	    }
+	    
+	    if (a_mode==2 || a_mode==4) {
+	      logl_H0=MphEM ('L', em_iter/10, em_prec*10, eval, 
+			     &X_sub2.matrix, Y, U_hat, E_hat, OmegaU, OmegaE, 
+			     UltVehiY, UltVehiBX, UltVehiU, UltVehiE, V_g, 
+			     V_e, &B_sub2.matrix);
+	      logl_H0=MphNR ('L', nr_iter/10, nr_prec*10, eval, 
+			     &X_sub2.matrix, Y, Hi_all, &xHi_all_sub2.matrix, 
+			     Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
+	      MphCalcBeta (eval, &X_sub2.matrix, Y, V_g, V_e, UltVehiY, 
+			   &B_sub2.matrix, se_B_null2);
+	    }
+	  }
+	  
+	  time_start=clock();
+	  
+	  // 3 is before 1.
+	  if (a_mode==3 || a_mode==4) {
+	    p_score=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, 
+			      V_g_null, V_e_null, UltVehiY, beta, Vbeta);
+	    
+	    if (p_score<p_nr && crt==1) {
+	      logl_H1=MphNR ('R', 1, nr_prec*10, eval, X, Y, Hi_all, xHi_all, 
+			     Hiy_all, V_g, V_e, Hessian, crt_a, crt_b, crt_c);
+	      p_score=PCRT (3, d_size, p_score, crt_a, crt_b, crt_c);
+	    }
+	  }
+	  
+	  if (a_mode==2 || a_mode==4) {
+	    logl_H1=MphEM ('L', em_iter/10, em_prec*10, eval, X, Y, U_hat, 
+			   E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, 
+			   UltVehiU, UltVehiE, V_g, V_e, B);
+
+	    // Calculate beta and Vbeta.
+	    p_lrt=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, 
+			    V_e, UltVehiY, beta, Vbeta);
+	    p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
+	    
+	    if (p_lrt<p_nr) {
+	      logl_H1=MphNR ('L', nr_iter/10, nr_prec*10, eval, X, Y, Hi_all, 
+			     xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, 
+			     crt_b, crt_c);
+	      
+	      // Calculate beta and Vbeta.
+	      p_lrt=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, 
+			      V_e, UltVehiY, beta, Vbeta);
+	      p_lrt=gsl_cdf_chisq_Q (2.0*(logl_H1-logl_H0), (double)d_size );
+	      if (crt==1) {
+		p_lrt=PCRT (2, d_size, p_lrt, crt_a, crt_b, crt_c);
+	      }
+	    }
+	  }
+	  
+	  if (a_mode==1 || a_mode==4) {
+	    logl_H1=MphEM ('R', em_iter/10, em_prec*10, eval, X, Y, U_hat, 
+			   E_hat, OmegaU, OmegaE, UltVehiY, UltVehiBX, 
+			   UltVehiU, UltVehiE, V_g, V_e, B);
+	    p_wald=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, 
+			     V_e, UltVehiY, beta, Vbeta);
+	    
+	    if (p_wald<p_nr) {
+	      logl_H1=MphNR ('R', nr_iter/10, nr_prec*10, eval, X, Y, Hi_all, 
+			     xHi_all, Hiy_all, V_g, V_e, Hessian, crt_a, 
+			     crt_b, crt_c);
+	      p_wald=MphCalcP (eval, &X_row2.vector, &X_sub2.matrix, Y, V_g, 
+			       V_e, UltVehiY, beta, Vbeta);
+	      
+	      if (crt==1) {
+		p_wald=PCRT (1, d_size, p_wald, crt_a, crt_b, crt_c);
+	      }
+	    }
+	  }
+	  
+	  if (x_mean>1) {gsl_vector_scale(beta, -1.0);}
 
-		c=0;
-		for (size_t i=0; i<d_size; i++) {
-			for (size_t j=i; j<d_size; j++) {
-				v_Vg[c]=gsl_matrix_get (V_g, i, j);
-				v_Ve[c]=gsl_matrix_get (V_e, i, j);
-				v_Vbeta[c]=gsl_matrix_get (Vbeta, i, j);
-				c++;
-			}
-		}
+	  time_opt+=(clock()-time_start)/(double(CLOCKS_PER_SEC)*60.0);
 
-		MPHSUMSTAT SNPs={v_beta, p_wald, p_lrt, p_score, v_Vg, v_Ve, v_Vbeta};
-		sumStat.push_back(SNPs);
-    }
+	  // Store summary data.
+	  for (size_t i=0; i<d_size; i++) {
+	    v_beta[i]=gsl_vector_get (beta, i);
+	  }
+	  
+	  c=0;
+	  for (size_t i=0; i<d_size; i++) {
+	    for (size_t j=i; j<d_size; j++) {
+	      v_Vg[c]=gsl_matrix_get (V_g, i, j);
+	      v_Ve[c]=gsl_matrix_get (V_e, i, j);
+	      v_Vbeta[c]=gsl_matrix_get (Vbeta, i, j);
+	      c++;
+	    }
+	  }
+	  
+	  MPHSUMSTAT SNPs={v_beta, p_wald, p_lrt, p_score, 
+			   v_Vg, v_Ve, v_Vbeta};
+	  sumStat.push_back(SNPs);
+	}
 	cout<<endl;
 
-	//cout<<"time_opt = "<<time_opt<<endl;
-
 	infile.close();
 	infile.clear();