MATLAB Answers

# Holding stepplot and pzplot in same loop

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am on 12 Feb 2021
Answered: Reshma Nerella on 18 Feb 2021
Hi,
I am unable to hold both stepplot and pzplot in this loop despite trying different answers in the forum.
Can someone help?
syms g s z w
w1 = 4
z1 = 0.5
getAllInfo(w1,z1)
w2 = 4
z2 = 0.3
getAllInfo(w2,z2)
w3 = 2
z3 = 0.5
getAllInfo(w3,z3)
w4 = 2
z4 = 0.3
getAllInfo(w4,z4)
function getAllInfo(w,z)
num = [w^2]
den = [1 2*z*w w^2]
G = tf(num, den)
stepplot(G);
ax1 = axes ;
hold(ax1,'on')
figure()
pzplot(G);
ax2 = axes ;
hold(ax2,'on')
end
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### Accepted Answer

Reshma Nerella on 18 Feb 2021
Hi,
One solution might be creating axes outside the function and pass them as parameters to the function.
Use hold on and plot on required axes.
For instance
f1 = figure;
ax1 = axes(f1) ;
f2 = figure;
ax2 = axes(f2) ;
hold(ax1,'on');
hold(ax2,'on');
syms g s z w
w1 = 4
z1 = 0.5
getAllInfo(w1,z1,ax1,ax2)
function getAllInfo(w,z,ax1,ax2)
num = [w^2]
den = [1 2*z*w w^2]
G = tf(num, den)
stepplot(ax1,G);
pzplot(ax2,G);
end
This will create all stepplots in one figure and pzplots in other one.
Hope this helps!
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