torch.atan2

torch.atan2(input, other, *, out=None) → Tensor

Element-wise arctangent of \(\text{input}_{i} / \text{other}_{i}\) with consideration of the quadrant. Returns a new tensor with the signed angles in radians between vector \((\text{other}_{i}, \text{input}_{i})\) and vector \((1, 0)\). (Note that \(\text{other}_{i}\), the second parameter, is the x-coordinate, while \(\text{input}_{i}\), the first parameter, is the y-coordinate.)

The shapes of input and other must be broadcastable.

Parameters:

• input (Tensor) – the first input tensor

• other (Tensor) – the second input tensor

Keyword Arguments:

out (Tensor, optional) – the output tensor.

Example:

>>> a = torch.randn(4)
>>> a
tensor([ 0.9041,  0.0196, -0.3108, -2.4423])
>>> torch.atan2(a, torch.randn(4))
tensor([ 0.9833,  0.0811, -1.9743, -1.4151])