Plotting multiple points on a graph using for loop

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.

Answer 1

[SHIVAM KUMAR]

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.

[SHIVAM KUMAR]

The image I got

[Batrisyia Mohamad Asri]

Thank you so much for your help!

[Batrisyia Mohamad Asri]

hi, i have to use anonymous function in my code. Could you please tell me which part i should modify. Thank you!

[SHIVAM KUMAR]

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]

You needed to use the function name instead of y.

[Batrisyia Mohamad Asri]

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]

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 :)

[Batrisyia Mohamad Asri]

Got it! Thank you so much!

[SHIVAM KUMAR]

Accept my answer if that is correct.