plzr pole-zero plot

## Syntax

    plzr(sl)

## Arguments

sl

  A linear dynamical system, in state space, transfer function or zpk representations, in continuous or discrete time.

## Description

`plzr(sl)` produces a pole-zero plot of the linear system `sl`.

## Examples

    s=poly(0,'s');
    n=[1+s   2+3*s+4*s^2        5; 0        1-s             s];
    d=[1+3*s   5-s^3           s+1;1+s     1+s+s^2      3*s-1];
    h=syslin('c',n./d);
    plzr(h);

## See also

- trzeros
- roots
- syslin
- zpk

## History

6.0

handling zpk representation