numpy.sign(x[, out]) =
Returns an element-wise indication of the sign of a number.
The sign
function returns -1 if x < 0, 0 if x==0, 1 if x > 0
.
Parameters: |
x : array_like Input values. |
---|---|
Returns: |
y : ndarray The sign of |
>>> np.sign([-5., 4.5]) array([-1., 1.]) >>> np.sign(0) 0
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https://docs.scipy.org/doc/numpy-1.10.1/reference/generated/numpy.sign.html