Specifications

pzmap
16-173
16pzmap
Purpose Compute the pole-zero map of an LTI model
Syntax pzmap(sys)
pzmap(sys1,sys2,...,sysN)
[p,z] = pzmap(sys)
Description pzmap(sys) plots the pole-zero map of the continuous- or discrete-time LTI
model
sys.ForSISOsystems,pzmap plotsthetransferfunctionpolesandzeros.
ForMIMOsystems,itplots the system polesandtransmissionzeros.The poles
are plotted as
x’s and the zeros are plotted as o’s.
pzmap(sys1,sys2,...,sysN) plots the pole-zero map of several LTI models on
a single figure. The LTI models can have different numbers of inputs and
outputs and can be a mix of continuous and discrete systems.
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.
Youcan usethefunctions
sgrid orzgrid toplot lines ofconstantdampingratio
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]); sgrid
sz
Hs
()
2s
2
5s 1++
s
2
2s 3++
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