# HG changeset patch
# User Olivier Breuleux <breuleuo@iro.umontreal.ca>
# Date 1217881319 14400
# Node ID 0f366ecb11ee6f862c89dab2d3f9d2ca3b4f99fd
# Parent  319bf28c2dd5c8f4b09b94da8f1411aa51dacce3
log2->log in cost

diff -r 319bf28c2dd5 -r 0f366ecb11ee cost.py
--- a/cost.py	Fri Jul 11 15:33:27 2008 -0400
+++ b/cost.py	Mon Aug 04 16:21:59 2008 -0400
@@ -8,4 +8,4 @@
     return T.mean(T.sqr(target - output), axis)
 
 def cross_entropy(target, output, axis=1):
-    return -T.mean(target * T.log2(output) + (1 - target) * T.log2(1 - output), axis=axis)
+    return -T.mean(target * T.log(output) + (1 - target) * T.log(1 - output), axis=axis)