# fspecial

Creates a filter that can be used for image processing.

## Syntax

R = fspecial(type)

R = fspecial(type, size)

R = fspecial('gaussian', size, sigma)

## Inputs

`type`- Type of filter. Valid values are 'average', 'gaussian', 'kirsch', 'prewit' and 'sobel'
`size`- Optional argument that determines the size of the filter created. Applicable only to filter types of 'average' and 'gaussian'. Must be a real integer or a real vector of size 2. Default value is 3 and a size by size filter is created. If size is a real vector, a filter of size(1) by size(2) is created.
`property`- Optional argument for 'gaussian' filter specifying the standard deviation. Has a default value of 0.5.

## Outputs

- R
- Resulting filter.

## Example

Create a Gaussian filter:

```
R = fspecial('gaussian', 5, 0.7)
R = [Matrix] 5 x 5
0.00009 0.00198 0.00548 0.00198 0.00009
0.00198 0.04220 0.11707 0.04220 0.00198
0.00548 0.11707 0.32480 0.11707 0.00548
0.00198 0.04220 0.11707 0.04220 0.00198
0.00009 0.00198 0.00548 0.00198 0.00009
```