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pzmap | Examples See Also |

Compute the pole-zero map of an LTI model

Syntax

pzmap(sys) [p,z] = pzmap(sys)

Description

```
pzmap(sys)
```

plots the pole-zero map of the continuous- or discrete-time LTI model `sys`

. For SISO systems, `pzmap`

plots the transfer function poles and zeros. For MIMO systems, it plots the system poles and transmission zeros. The poles are plotted as `x`

's and the zeros are plotted as `o`

's.
When invoked without left-hand arguments,
[p,z] = pzmap(sys)returns the system poles and (transmission) zeros in the column vectors

`p`

and `z`

. No plot is drawn on the screen.
You can use the functions `sgrid`

or `zgrid`

to plot lines of constant damping ratio and natural frequency in the - or -plane.
Example

Plot the poles and zeros of the continuous-time system.H = tf([2 5 1],[1 2 3]) pzmap(H)

Algorithm

`pzmap`

uses a combination of `pole`

and `zero`

.
See Also

`damp`

` `

Damping and natural frequency of system poles
`esort`

, `dsort`

Sort system poles
` `

`pole`

Compute system poles
` `

`rlocus`

Root locus
` `

`sgrid`

, `zgrid`

Plot lines of constant damping and natural frequency
` `

`zero`

Compute system (transmission) zeros
` `