BNW using Octave instead of Matlab.

This version of BNW should perform the same as the original version. The only difference is that it uses Octave instead of Matlab when running BayesNet Toolbox during parameter learning.

I am calling this BNW_1.02. It can be accessed at:
compbio.uthsc.edu/BNW_1.02

1 files changed, 22 insertions, 0 deletions

diff --git a/sourcecodes/bnt-master/KPMstats/mixgauss_sample.m b/sourcecodes/bnt-master/KPMstats/mixgauss_sample.m
new file mode 100644
index 00000000..9438d5f0
--- /dev/null
+++ b/sourcecodes/bnt-master/KPMstats/mixgauss_sample.m
@@ -0,0 +1,22 @@
+function [data, indices] = mixgauss_sample(mu, Sigma, mixweights, Nsamples)
+%  mixgauss_sample Sample data from a mixture of Gaussians
+% function [data, indices] = mixgauss_sample(mu, Sigma, mixweights, Nsamples)
+%
+% Model is P(X) = sum_k mixweights(k) N(X; mu(:,k), Sigma(:,:,k)) or Sigma(k) for scalar
+% data(:,i) is the i'th sample from P(X)
+% indices(i) is the component from which sample i was drawn
+
+[D K] = size(mu);
+data = zeros(D, Nsamples);
+indices = sample_discrete(mixweights, 1, Nsamples);
+for k=1:K
+  if ndims(Sigma) < 3
+    sig = Sigma(k);
+  else
+    sig = Sigma(:,:,k);
+  end
+  ndx = find(indices==k);
+  if length(ndx) > 0
+    data(:,ndx) = sample_gaussian(mu(:,k), sig, length(ndx))';
+  end
+end