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annotate 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
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children b6a146f0a61b
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1214c127fe43 steps towards logistic regression
Jeff Hammel <k0scist@gmail.com>
parents:
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1 """
1214c127fe43 steps towards logistic regression
Jeff Hammel <k0scist@gmail.com>
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2 z = w'x + b
1214c127fe43 steps towards logistic regression
Jeff Hammel <k0scist@gmail.com>
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3 a = sigmoid(z)
1214c127fe43 steps towards logistic regression
Jeff Hammel <k0scist@gmail.com>
parents:
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4 L(a,y) = -(y*log(a) + (1-y)*log(1-a))
1214c127fe43 steps towards logistic regression
Jeff Hammel <k0scist@gmail.com>
parents:
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5 """