I am using pole-zero map (pzmap) and i want to enhance the size of pole or zero (or in other words i want to change the marker size). Please guide me how can i do by coding?

I am using MATLAB 2016a and ploting pzmap of the transfer fucntion. I want to enhance the marker size of the pole or zero on map. But, i cannot fine how to do this by coding? I can change the color of pole or zero but i can not change the maker size.

Answer 1

[Star Strider]

It is not obvious, and requires some experience with ‘handle diving’ into graphics objects.

Try this:

H = tf([2 5 1],[1 3 5]);                    % Define System
pzmap(H)                                    % Create Plot
hm = findobj(gca, 'Type', 'Line');          % Handle To 'Line' Objects
hm(2).MarkerSize = 20;                      % ‘Zero’ Marker
hm(3).MarkerSize = 20;                      % ‘Pole’ Marker

This changes them from their default size of 7 to 20.

EDIT — This works in R2018b. I cannot test it with earlier releases.