Plotting multiple points on a graph using for loop

2021 2 2
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更新时间：2021 2 5
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Hi. I would like to plot multiple points on a graph using for loop and subplot. I have an xi value of 0.2 to 0.8 with increments of 0.2. And the for loop is used to go through each xi value. The legend can be hardcoded and is positioned in the 'best' location. The result should look like the first subplot below.
The equation is given by the pic below
This is what i've done so far.
clc;clear all;close all
y = @(t,xi,omega) 1-exp^-xi*omega*t/sqrt(1-xi^2)*sin(omega*sqrt(1-xi^2)*t+acos(xi));
omega = 10.26;
t = linspace(0,1,200);
%plotting
xi= 0.2:0.2:0.8;
n = length(xi);
for i=1:n
subplot(2,1,1)
plot(xi,y)
end
Your help is very much appreciated! Thank you.

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SHIVAM KUMAR
SHIVAM KUMAR 2021-2-2
编辑：SHIVAM KUMAR 2021-2-4

0 个投票

Final version
clc
clear all
close all
fn= @(xi,omega,t) (1-((exp(-xi*omega*t))/sqrt(1-xi^2)).*sin(omega*sqrt(1-xi^2)*t+acos(xi)));
omega = 10.26;
t = linspace(0,1,200);
%plotting
x1= 0.2:0.2:0.8;
n = length(x1);
figure;
subplot 211
for i=1:n
Y = fn(x1(i),omega,t);
plot(t,Y)
hold on
end
legend("xi=0.2","xi=0.4","xi=0.6","xi=0.8")
ylim([0 2])
hold off
title("Omega=10.26")
xlabel("t")
ylabel("y")
%for second plot
next= fn(0.65,omega,t);
subplot 212
plot(t,next)
ylim([0 1.2])
hold on
legend("step response")
The indexes were not nicely choosen in function. I corrected that now though.

9 个评论
显示 7更早的评论 隐藏 7更早的评论

hi, i have to use anonymous function in my code. Could you please tell me which part i should modify. Thank you!
SHIVAM KUMAR
SHIVAM KUMAR 2021-2-3
I have edited my code just that you have to use brackets or it will cause error. Everything remains the same just added the function.
SHIVAM KUMAR
SHIVAM KUMAR 2021-2-3
You needed to use the function name instead of y.
hello, i tried to run your code but matlab gives me error when i click run for the first time. But when i click run again for the second time, it gives me the desired answer. Not sure why this happens. hope you can help me out. thanks!
SHIVAM KUMAR
SHIVAM KUMAR 2021-2-4
I had messed up a bit with array positning. Have corrected that now.
It works well now.
Accept my answer if that's good to go :)
SHIVAM KUMAR
SHIVAM KUMAR 2021-2-5
Accept my answer if that is correct.

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