Create a new floating-point tensor with the magnitude of input and the sign of other, elementwise.
out i = { − ∣ input i ∣ if other i ≤ − 0.0 ∣ input i ∣ if other i ≥ 0.0 \text{out}_{i} = \begin{cases} -|\text{input}_{i}| & \text{if } \text{other}_{i} \leq -0.0 \\ |\text{input}_{i}| & \text{if } \text{other}_{i} \geq 0.0 \\ \end{cases} outi={−∣inputi∣∣inputi∣if otheri≤−0.0if otheri≥0.0
>>> a = torch.randn(5)
>>> a
tensor([-1.2557, -0.0026, -0.5387, 0.4740, -0.9244])
>>> torch.copysign(a, 1)
tensor([1.2557, 0.0026, 0.5387, 0.4740, 0.9244])
>>> a = torch.randn(4, 4)
>>> a
tensor([[ 0.7079, 0.2778, -1.0249, 0.5719],
[-0.0059, -0.2600, -0.4475, -1.3948],
[ 0.3667, -0.9567, -2.5757, -0.1751],
[ 0.2046, -0.0742, 0.2998, -0.1054]])
>>> b = torch.randn(4)
tensor([ 0.2373, 0.3120, 0.3190, -1.1128])
>>> torch.copysign(a, b)
tensor([[ 0.7079, 0.2778, 1.0249, -0.5719],
[ 0.0059, 0.2600, 0.4475, -1.3948],
[ 0.3667, 0.9567, 2.5757, -0.1751],
[ 0.2046, 0.0742, 0.2998, -0.1054]])
>>> a = torch.tensor([1.])
>>> b = torch.tensor([-0.])
>>> torch.copysign(a, b)
tensor([-1.])
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