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

• 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])