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slchangtw/ad_example

Created May 27, 2017 11:13
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ad_example
from ad import adnumber
from ad import admath
import numpy as np
# ref: http://cs231n.github.io/optimization-2/
w = adnumber(np.array([2, -3, -3]))
x = adnumber(np.array([-1, -2, 1]))
f = 1 / (1 + admath.exp(-sum(w * x)))
f.gradient(w)
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