005-001-lec. hypothesis function of logistic regression(classification)
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# Sigmoid function $$$g(z) = \frac{1}{(1+e^{-z})}$$$, $$$0<g(z)<1$$$
# Hypothesis function of logistic regression(classification)
# XW = z
# $$$H(x) = \frac{1}{(1+e^{-z})}$$$
# $$$H(x) = \frac{1}{(1+e^{-XW})}$$$
# $$$H(x) = \frac{1}{(1+e^{-W^{T}X})}$$$
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