Multiple plots in a single graph

I have the following code for a ball & beam system:

m = 0.111;
R = 0.015;
g = -9.8;
L = 1.0;
d = 0.03;
J = 9.99e-6;

s = tf('s');
P_ball = -m*g*d/L/(J/R^2+m)/s^2

figure(1)
pzmap(P_ball)
grid

figure(2)
step(P_ball)
grid

How can I plot multiple curves of the step response of the system for different values of m, all in the same graph? I don't mean to separate them into different subplots within the same figure; instead, I need them all to share the same axes for ease of comparison.

Answer 1

[Star Strider]

It is necessary to create them in a loop, storing them in a cell array. After that, a single call to the functions works —

m = 0.111*(1:5);
R = 0.015;
g = -9.8;
L = 1.0;
d = 0.03;
J = 9.99e-6;

s = tf('s');
for k = 1:numel(m)
    P_ball{k} = -m(k)*g*d/L/(J/R^2+m(k))/s^2;
end

figure(1)
pzmap(P_ball{:})
grid
axis([-1  1    -1  1]*1E-3)

figure(2)
step(P_ball{:})
grid
legend(compose('m = %.3f',m), 'Location','best')

This works correctly in R2021a.

.

Answer 2

[Walter Roberson]

R = 0.015;
g = -9.8;
L = 1.0;
d = 0.03;
J = 9.99e-6;

s = tf('s');

for m = 0.09:.01:0.13
  P_ball = -m*g*d/L/(J/R^2+m)/s^2;

  figure(1)
  pzmap(P_ball)
  grid
  hold on

  figure(2)
  step(P_ball)
  grid
  hold on
end