changed from log2 to natural log

entropy.m

@@ -13,6 +13,9 @@ function e=entropy(x)
 % $Revision$
 %
 % $Log$
+% Revision 2.1  2004/11/10 07:07:51  marwan
+% initial import
+%
 %
 % This program is free software; you can redistribute it and/or
 % modify it under the terms of the GNU General Public License
@@ -25,5 +28,5 @@ if nargout>1, error('Too many output arguments'), end
 for j=1:size(x,2);
   x(:,j)=x(:,j)./sum(x(:,j));
   x2=x(find(x(:,j)),j);
-  e(:,j)=sum(-x2.*log2(x2));
+  e(:,j)=sum(-x2.*log(x2));
 end