# HG changeset patch
# User gdesjardins
# Date 1287760311 14400
# Node ID 4ac393ec2eb7ac777af69a4e17c484bb17d13a03
# Parent  fbe4a63834419794edfbd8dc265dd042c1ccd94d
Fixed comments in leapfrog method

diff -r fbe4a6383441 -r 4ac393ec2eb7 pylearn/sampling/hmc.py
--- a/pylearn/sampling/hmc.py	Fri Oct 22 10:58:57 2010 -0400
+++ b/pylearn/sampling/hmc.py	Fri Oct 22 11:11:51 2010 -0400
@@ -95,8 +95,8 @@
         pos: theano matrix
             in leapfrog update equations, represents pos(t), position at time t
         vel: theano matrix
-            in leapfrog update equations, represents vel(t + stepsize/2), 
-            velocity at time (t + stepsize/2)
+            in leapfrog update equations, represents vel(t - stepsize/2), 
+            velocity at time (t - stepsize/2)
         step: theano scalar
             scalar value controlling amount by which to move
         
@@ -104,7 +104,7 @@
         -------
         rval1: [theano matrix, theano matrix]
             Symbolic theano matrices for new position pos(t + stepsize), and velocity
-            vel(t+3*stepsize/2)
+            vel(t + stepsize/2)
         rval2: dictionary
             Dictionary of updates for the Scan Op
         """