Mercurial > pylearn
view cost.py @ 431:0f8c81b0776d
Adding file make_test_datasets to host simple data-generating processes
to create artificial datasets meant to test various learning algorithms.
| author | Yoshua Bengio <bengioy@iro.umontreal.ca> |
|---|---|
| date | Tue, 29 Jul 2008 10:19:25 -0400 |
| parents | 319bf28c2dd5 |
| children | 0f366ecb11ee |
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""" Cost functions. """ import theano.tensor as T def quadratic(target, output, axis=1): return T.mean(T.sqr(target - output), axis) def cross_entropy(target, output, axis=1): return -T.mean(target * T.log2(output) + (1 - target) * T.log2(1 - output), axis=axis)