# freqz2

2-D frequency response

## Syntax

## Description

`[`

returns the 64-by-64 frequency response `H`

,`fx`

,`fy`

] = freqz2(`h`

)`H`

of the 2-D FIR filter
`h`

. `h`

must be in the form of a
correlation kernel. `freqz2`

also returns the frequency vectors
`fx`

and `fy`

as normalized frequencies in
the range -1.0 to 1.0, where 1.0 corresponds to half the sampling frequency, or π
radians.

`freqz2(___)`

displays a mesh plot of the 2-D
magnitude frequency response when no output arguments are specified.

## Examples

## Input Arguments

## Output Arguments

## Version History

**Introduced before R2006a**