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comparison algorithms/logistic_regression.py @ 472:69c800af1370

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changed weight initialization for logistic regression
author James Bergstra <bergstrj@iro.umontreal.ca>
date Thu, 23 Oct 2008 13:26:42 -0400
parents bd937e845bbb
children 31acd42b2b0b
comparison
equal deleted inserted replaced
471:45b3eb429c15 472:69c800af1370
8 import numpy as N 8 import numpy as N
9 9
10 10
11 class Module_Nclass(module.FancyModule): 11 class Module_Nclass(module.FancyModule):
12 class __instance_type__(module.FancyModuleInstance): 12 class __instance_type__(module.FancyModuleInstance):
13 def initialize(self, n_in, n_out, rng=N.random): 13 def initialize(self, n_in, n_out):
14 #self.component is the LogisticRegressionTemplate instance that built this guy. 14 #self.component is the LogisticRegressionTemplate instance that built this guy.
15 15
16 self.w = rng.randn(n_in, n_out) 16 self.w = N.zeros((n_in, n_out))
17 self.b = rng.randn(n_out) 17 self.b = N.zeros(n_out)
18 self.lr = 0.01 18 self.lr = 0.01
19 self.__hide__ = ['params'] 19 self.__hide__ = ['params']
20 20
21 def __init__(self, x=None, targ=None, w=None, b=None, lr=None): 21 def __init__(self, x=None, targ=None, w=None, b=None, lr=None):
22 super(Module_Nclass, self).__init__() #boilerplate 22 super(Module_Nclass, self).__init__() #boilerplate