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comparison tvii/logistic_regression.py @ 2:1214c127fe43

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steps towards logistic regression
author Jeff Hammel <k0scist@gmail.com>
date Wed, 30 Aug 2017 17:05:03 -0700
parents
children b6a146f0a61b
comparison
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1:92a402736bcc 2:1214c127fe43
1 """
2 z = w'x + b
3 a = sigmoid(z)
4 L(a,y) = -(y*log(a) + (1-y)*log(1-a))
5 """