## Name

show_margins — display gain and phase margin and associated crossover frequencies

## Calling Sequence

show_margins(h)
show_margins(h,'bode')
show_margins(h,'nyquist')

## Parameters

- h
a SISO linear system (see :syslin).

## Description

Given a SISO linear system in continuous or discrete time,
`show_margins`

display gain and phase margin and
associated crossover frequencies on a bode (the defaut) or nyquist
representation of the frequency response of the system.

## Examples

//continuous case
h=syslin('c',0.02909+0.11827*%s+0.12823*%s^2+0.35659*%s^3+0.256*%s^4+0.1*%s^5,..
0.0409+0.1827*%s+1.28225*%s^2+3.1909*%s^3+2.56*%s^4+%s^5);
show_margins(h)
show_margins(h,'nyquist')
//discrete case
h = syslin(0.1,0.01547+0.01599*%z ,%z^2-1.81*%z+0.9048)
show_margins(h)
show_margins(h,'nyquist')

## Authors

Serge Steer, INRIA