# tensorplay.functional.mv

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

```python
tensorplay.functional.mv(input, vec, *, out=None) → Tensor
```

Performs a matrix-vector product of the matrix input and the vector
vec.

If input is a $(n \times m)$ tensor, vec is a 1-D tensor of
size $m$, out will be 1-D of size $n$.

> **Note**
>
> This function does not broadcast.

Parameters:

- input ([Tensor](/docs/generated/tensorplay.Tensor.html#tensorplay.Tensor)) – matrix to be multiplied

- vec ([Tensor](/docs/generated/tensorplay.Tensor.html#tensorplay.Tensor)) – vector to be multiplied

Keyword Arguments:

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

Example:

```
>>> mat = tensorplay.randn(2, 3)
>>> vec = tensorplay.randn(3)
>>> tensorplay.mv(mat, vec)
tensor([ 1.0404, -0.6361])
```