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-rw-r--r--src/gemma.cpp6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/gemma.cpp b/src/gemma.cpp
index 906b426..4c22329 100644
--- a/src/gemma.cpp
+++ b/src/gemma.cpp
@@ -323,7 +323,11 @@ void GEMMA::PrintHelp(size_t option) {
cout << " ..." << endl;
cout << " missing value: NA" << endl;
cout << " -widv [filename] "
- << " specify input file that contains a column of residual weights"
+ << " weight file contains a column of positive values to be used "
+ << "as weights for residuals---each weight corresponds to an "
+ << "individual, in which a high weight corresponds to high "
+ << "residual error variance for this individual (similar in "
+ << "format to phenotype file)"
<< endl;
cout << " format: variable for individual 1" << endl;
cout << " variable for individual 2" << endl;