Change pzplot marker size

Hello,

How do i change the marker size for the pzplot ?

Answer 1

[Azzi Abdelmalek]

h=tf(1,[1 1 5])
pzplot(h)
findobj(gca,'type','line')
set(a(2),'markersize',7)
set(a(3),'markersize',7)

[RuiQi]

Edit: Got it to work thanks :)

[David Willis]

In Version 2013a I had to make a small modification to the code above. I also added a line to show how to change the marker linewidth.

a = findobj returns an array of double. In the case below, a(3) points to all the pole markers, a(2) to the zero markers. The for loop is a lazy man way of getting them all.

h=tf([1 2],[1 1 5])
pzplot(h)

a = findobj(gca,'type','line')
for i = 1:length(a)
    set(a(i),'markersize',12) %change marker size
    set(a(i), 'linewidth',2)  %change linewidth
end

[Kamilu Sanusi]

@Azzi Abdelmalek, if i am plotting eigen values of more than one matrix, and I want to change the pole and zero of markers for each matrix on the same pz plot, please how do i make changes? I am more of concern with the thickness (boldness) of the marker than the size

if D == 15

pzmap(T,'r')

end

hold on

if D == 25

pzmap(T,'m')

end

Thank you

Answer 2

[Stephen Wilkerson]

% Let's change the symbol size

% Why Mathworks makes the symbols unseeable is beyond me

% Why mathworks makes this harder then it should be is beyond me

% Here is a solution that works, unlike the above!

sys1 = tf(4,[1 0 4]);

h = pzplot(sys1)

grid on

a = findobj(gca,'type','line');

for i = 1:length(a)

set(a(i),'markersize',20); %change marker size

set(a(i), 'linewidth',2); %change linewidth

set(a(i),'Color','r')

end