# HG changeset patch
# User Pierre-Antoine Manzagol <pierre.antoine.manzagol@gmail.com>
# Date 1265770954 18000
# Node ID 2f8614685be3e1ca29de4b87b652170fc50121ff
# Parent  4e3a3d9fef4306bb9ce005551f369955d781cdbf
Nist SD dataset: modified preproc so input is between -1 an 1.

diff -r 4e3a3d9fef43 -r 2f8614685be3 pylearn/datasets/nist_sd.py
--- a/pylearn/datasets/nist_sd.py	Tue Feb 09 20:14:46 2010 -0500
+++ b/pylearn/datasets/nist_sd.py	Tue Feb 09 22:02:34 2010 -0500
@@ -8,7 +8,7 @@
 from pylearn.datasets.dataset import Dataset
 
 def nist_to_float(x):
-  return x / 255.0
+  return (x - 128)/ 128.0
 
 def load(dataset = 'train', attribute = 'data'):
   """Load the filetensor corresponding to the set and attribute.