# isbanded

Determines if the input is a banded matrix.

## Syntax

b = isbanded(x, lower, upper)

## Inputs

`x`- The object to check.
`lower`- The number of lower diagonals.
`upper`- The number of upper diagonals.

## Outputs

- b
- A logical 1 when
`x`is a banded matrix, and 0 otherwise.

## Example

```
m = diag(ones(1,10), 12, 10);
m(3, 7) = 1;
b = isbanded(m, 4, 3)
```

`b = 1`