User`s guide

pzmap
11-173
11pzmap
Purpose Compute the pole-zero ma p 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.ForSISOsystems,pzmap plotsthe transferfunctionpolesandzeros.
ForMIMO systems,it plotsthe systempolesa nd transmissionzeros.The poles
are plo tt ed as
x’s and the zeros are plotted as o’s.
When i nvoked w ithout left-hand arguments,
[p,z] = pzmap(sys)
returns t he system poles and (transmission) zeros in the column vectors p and
z. No plot is drawn on the screen.
Youcanusethefunctions
sgrid or zgrid toplot linesof constant dampingratio
and natural frequency in the - or -plane .
s
z