copysign(x1, x2, out=None, where=None, **kwargs)¶
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.
- x1 : array_like
- Values to change the sign of.
- x2 : array_like
- The sign of x2 is copied to x1.
- out : Tensor, None, or tuple of Tensor 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 tensor 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.
- out : array_like
- The values of x1 with the sign of x2.
>>> import mars.tensor as mt
>>> mt.copysign(1.3, -1).execute() -1.3 >>> (1/mt.copysign(0, 1)).execute() inf >>> (1/mt.copysign(0, -1)).execute() -inf
>>> mt.copysign([-1, 0, 1], -1.1).execute() array([-1., -0., -1.]) >>> mt.copysign([-1, 0, 1], mt.arange(3)-1).execute() array([-1., 0., 1.])