# iir_butterzpk

Version:

Generates the zeros, poles, and gain of an analog Butterworth lowpass filter of the order specified by n. z is always the empty vector.

## Syntax

[z, p, k] = iir_butterzpk(n)
Legacy name: buttap

## n

Filter order. n is a positive integer.

## z

Zeros of the filter. z is a vector.

## p

Poles of the filter. p is a vector.

## k

Gain of the filter. k is a real number.

N = 5;
[Z, P, K] = iir_butterzpk(N)

Where This Node Can Run:

Desktop OS: Windows

FPGA: This product does not support FPGA devices