Mercurial > pylearn

annotate sandbox/simple_autoassociator/main.py @ 425:e2b46a8f2b7b

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Debugging kernel regression
author Yoshua Bengio <bengioy@iro.umontreal.ca>
date Sat, 19 Jul 2008 17:57:46 -0400
parents 4f61201fa9a9
children
rev   line source
370
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
1 #!/usr/bin/python
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
2 """
386
a474341861fa Added a simple AA
Joseph Turian <turian@gmail.com>
parents: 381
diff changeset
3 A simple autoassociator.
370
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
4
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
5 The learned model is::
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
6 h = sigmoid(dot(x, w1) + b1)
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
7 y = sigmoid(dot(h, w2) + b2)
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
8
386
a474341861fa Added a simple AA
Joseph Turian <turian@gmail.com>
parents: 381
diff changeset
9 Binary xent loss.
370
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
10 """
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
11
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
12
372
75bab24bb2d8 Moved more logic into model.py
Joseph Turian <turian@gmail.com>
parents: 371
diff changeset
13 import numpy
370
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
14
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
15 nonzero_instances = []
392
e2cb8d489908 More debugging
Joseph Turian <turian@gmail.com>
parents: 389
diff changeset
16 nonzero_instances.append({0: 1, 1: 1})
e2cb8d489908 More debugging
Joseph Turian <turian@gmail.com>
parents: 389
diff changeset
17 nonzero_instances.append({0: 1, 2: 1})
e2cb8d489908 More debugging
Joseph Turian <turian@gmail.com>
parents: 389
diff changeset
18
e2cb8d489908 More debugging
Joseph Turian <turian@gmail.com>
parents: 389
diff changeset
19 #nonzero_instances.append({1: 0.1, 5: 0.5, 9: 1})
e2cb8d489908 More debugging
Joseph Turian <turian@gmail.com>
parents: 389
diff changeset
20 #nonzero_instances.append({2: 0.3, 5: 0.5, 8: 0.8})
e2cb8d489908 More debugging
Joseph Turian <turian@gmail.com>
parents: 389
diff changeset
21 ##nonzero_instances.append({1: 0.2, 2: 0.3, 5: 0.5})
370
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
22
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
23 import model
417
4f61201fa9a9 Parameters are no longer global
Joseph Turian <turian@iro.umontreal.ca>
parents: 416
diff changeset
24 model = model.Model(input_dimension=10, hidden_dimension=4)
370
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
25
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
26 for i in xrange(100000):
416
8849eba55520 Can now do minibatch update
Joseph Turian <turian@iro.umontreal.ca>
parents: 393
diff changeset
27 # # Select an instance
8849eba55520 Can now do minibatch update
Joseph Turian <turian@iro.umontreal.ca>
parents: 393
diff changeset
28 # instance = nonzero_instances[i % len(nonzero_instances)]
370
a1bbcde6b456 Moved sparse_random_autoassociator from my repository
Joseph Turian <turian@gmail.com>
parents:
diff changeset
29
416
8849eba55520 Can now do minibatch update
Joseph Turian <turian@iro.umontreal.ca>
parents: 393
diff changeset
30 # Update over instance
8849eba55520 Can now do minibatch update
Joseph Turian <turian@iro.umontreal.ca>
parents: 393
diff changeset
31 model.update(nonzero_instances)