X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fmath%2Fcorrelation.h;h=5771f43e71bda48b1a130e51a0f531321be2853e;hb=209f7e5ccf28c97641b9e69ef6b9df81efe4dc38;hp=27621c47c9c3219a63fdb71b3a9ad0e275074585;hpb=3bbb4370239deb29ebbf813d258aef6249e2a431;p=pspp

diff --git a/src/math/correlation.h b/src/math/correlation.h
index 27621c47c9..5771f43e71 100644
--- a/src/math/correlation.h
+++ b/src/math/correlation.h
@@ -20,7 +20,9 @@
 
 #include <gsl/gsl_matrix.h>
 
-gsl_matrix * correlation_from_covariance (const gsl_matrix *cv, const gsl_matrix *v);
+gsl_matrix *correlation_from_covariance (const gsl_matrix *cv, const gsl_matrix *v);
+
+gsl_matrix *covariance_from_correlation (const gsl_matrix *corr, const gsl_matrix *v);
 
 double significance_of_correlation (double rho, double w);