Mercurial > pylearn

comparison pylearn/sandbox/rbm/parameters.py @ 537:b054271b2504

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new file structure layout, factories, etc.
author James Bergstra <bergstrj@iro.umontreal.ca>
date Wed, 12 Nov 2008 21:57:54 -0500
parents sandbox/rbm/parameters.py@c2e6a8fcc35e
children
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518:4aa7f74ea93f 537:b054271b2504
1 """
2 Parameters (weights) used by the L{Model}.
3 """
4
5 import numpy
6
7 class Parameters:
8 """
9 Parameters used by the L{Model}.
10 """
11 def __init__(self, input_dimension, hidden_dimension, randomly_initialize, random_seed):
12 """
13 Initialize L{Model} parameters.
14 @param randomly_initialize: If True, then randomly initialize
15 according to the given random_seed. If False, then just use zeroes.
16 """
17 if randomly_initialize:
18 numpy.random.random_seed(random_seed)
19 self.w = (numpy.random.rand(input_dimension, hidden_dimension)-0.5)/input_dimension
20 self.b = numpy.zeros((1, hidden_dimension))
21 self.c = numpy.zeros((1, input_dimension))
22 else:
23 self.w = numpy.zeros((input_dimension, hidden_dimension))
24 self.b = numpy.zeros((1, hidden_dimension))
25 self.c = numpy.zeros((1, input_dimension))
26
27 def __str__(self):
28 s = ""
29 s += "w: %s\n" % self.w
30 s += "b: %s\n" % self.b
31 s += "c: %s\n" % self.c
32 return s