# var

Compute variance values.

## Syntax

v = var(x)

v = var(x,scale)

v = var(x,scale,dim)

## Inputs

`x`- Data sample.
`scale`- Scale option.
`dim`- Dimension on which to perform the calculation.

## Outputs

- v
- Variance.

## Example 1

Vector example.

```
x=[9.3, 10.6, 11.9, 13.3, 15.1, 18.2];
v=var(x)
```

`v = 10.435`

## Example 2

Matrix example.

```
x=[9.3, 4.8; 10.6, 6.6; 11.9, 8.0; 13.3, 9.3; 15.1, 10.6; 18.2, 11.9];
v=var(x)
```

```
v = [Matrix] 1 x 2
10.435 6.8307
```

## Comments

`var (x) = SUM(x(i) - mean(x))^2 / (n-1)`

This is the definition for scale = 0.