numpy.copysign — NumPy v1.13 Manual (original) (raw)
numpy. copysign(x1, x2, /, out=None, *, where=True, casting='same_kind', order='K', dtype=None, _subok=True_[, signature, _extobj_]) = <ufunc 'copysign'>¶
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 of_x1_.
| Parameters: | x1 : array_like Values to change the sign of. x2 : array_like The sign of x2 is copied to x1. out : ndarray, None, or tuple of ndarray and None, optional A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned. A tuple (possible only as a keyword argument) must have length equal to the number of outputs. where : array_like, optional Values of True indicate to calculate the ufunc at that position, values of False indicate to leave the value in the output alone. **kwargs For other keyword-only arguments, see theufunc docs. |
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| Returns: | out : array_like The values of x1 with the sign of x2. |
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.])