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numpy.copysign(x1, x2[, out]) =
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Change the sign of x1 to that of x2, element-wise.
If both arguments are arrays or sequences, they have to be of the same length. If
x2
is a scalar, its sign will be copied to all elements ofx1
.Parameters: x1 : array_like
Values to change the sign of.
x2 : array_like
The sign of
x2
is copied tox1
.out : ndarray, optional
Array into which the output is placed. Its type is preserved and it must be of the right shape to hold the output. See doc.ufuncs.
Returns: out : array_like
The values of
x1
with the sign ofx2
.Examples
>>> np.copysign(1.3, -1) -1.3 >>> 1/np.copysign(0, 1) inf >>> 1/np.copysign(0, -1) -inf
>>> np.copysign([-1, 0, 1], -1.1) array([-1., -0., -1.]) >>> np.copysign([-1, 0, 1], np.arange(3)-1) array([-1., 0., 1.])
numpy.copysign()
2017-01-10 18:13:08
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