# HG changeset patch
# User James Bergstra <bergstrj@iro.umontreal.ca>
# Date 1286732368 14400
# Node ID 881bce55a2037391906d81c6d23700f03d368edc
# Parent  7185d194bb7e9218a7d6c6647e14c218622c0576
pca bugfix when both max energy and max components are specified

diff -r 7185d194bb7e -r 881bce55a203 pylearn/preprocessing/pca.py
--- a/pylearn/preprocessing/pca.py	Fri Oct 08 12:07:56 2010 -0400
+++ b/pylearn/preprocessing/pca.py	Sun Oct 10 13:39:28 2010 -0400
@@ -62,7 +62,7 @@
         if max_energy_fraction < 1.0:
             energy = 0
             i = 0
-            while energy < max_energy_fraction * vartot:
+            while (energy < max_energy_fraction * vartot) and (i < len(w)):
                 energy += w[i]
                 i += 1
             if i < len(w):