# tensorplay.functional.sub

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

```python
tensorplay.functional.sub(input, other, *, alpha=1, out=None) → Tensor
```

Subtracts other, scaled by alpha, from input.

$$\text{{out}}_i = \text{{input}}_i - \text{{alpha}} \times \text{{other}}_i$$

Supports [broadcasting to a common shape](/docs/notes/broadcasting.html#broadcasting-semantics),
type promotion, and integer, float, and complex inputs.

Parameters:

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

- other ([Tensor](/docs/generated/tensorplay.Tensor.html#tensorplay.Tensor) or Number) – the tensor or number to subtract from input.

Keyword Arguments:

- alpha (Number) – the multiplier for other.

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

Example:

```
>>> a = tensorplay.tensor((1, 2))
>>> b = tensorplay.tensor((0, 1))
>>> tensorplay.sub(a, b, alpha=2)
tensor([1, 0])
```