# tensorplay.functional.atan2

Source: https://www.tensorplay.cn/docs/generated/tensorplay.functional.atan2.html

```python
tensorplay.functional.atan2(input: Tensor, other: Tensor, *, out: Tensor | 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](/docs/notes/broadcasting.html#broadcasting-semantics).

Parameters:

- input ([Tensor](/docs/generated/tensorplay.Tensor.html#tensorplay.Tensor)) – the first input tensor

- other ([Tensor](/docs/generated/tensorplay.Tensor.html#tensorplay.Tensor)) – the second input tensor

Keyword Arguments:

out ([Tensor](/docs/generated/tensorplay.Tensor.html#tensorplay.Tensor), optional) – the output tensor.

Example:

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