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view tvii/logistic_regression.py @ 6:be09c8fc58b8

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length assertion on vectors
author Jeff Hammel <k0scist@gmail.com>
date Wed, 30 Aug 2017 20:44:48 -0700
parents 1214c127fe43
children b6a146f0a61b
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"""
z = w'x + b
a = sigmoid(z)
L(a,y) = -(y*log(a) + (1-y)*log(1-a))
"""