# Multiple plotting issue?

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Adnan Barkat on 27 Jan 2022
Commented: Adnan Barkat on 27 Jan 2022
Hi everyone,
As per my script i expect an oputput of three plots but I get only one plot.
May someone suggets how i can fix this.
As per code there shoudl be three plots for t=1, 2 and 3, but i get only one plot for t=3.
clear all
clc
xs=8;
v=3;
L=20;
ta=0.2;
t=1:1:3;
for k=1:length(t)
n=1:1:40;
x=0:0.1:20;
omga = zeros(1,length(n));
F = zeros(1,length(n));
u = zeros(length(n),length(x));
for j=1:length(n)
F(j)=exp(-((n(j)*pi*v*ta/L).^2)/4);
u(j,:)=sin(n(j)*pi*xs/L)*F(j)*sin(n(j)*pi*x/L)*cos(n(j)*pi*v/L*t(k)); % no loop needed
end
us = sum(u);
plot(x,us)
end
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### Accepted Answer

Ankit on 27 Jan 2022
Edited: Ankit on 27 Jan 2022
Few recommendations to your code:
• try to define all the variable before loop
• don't use clear all in your code. Calling clear all decreases code performance, and is usually unnecessary. To clear one or more specific variables from the current workspace use clearvars instead
clc
xs=8;
v=3;
L=20;
ta=0.2;
t=1:1:3;
n=1:1:40;
x=0:0.1:20;
us = zeros(1,length(x));
omga = zeros(1,length(n));
F = zeros(1,length(n));
u = zeros(length(n),length(x));
for k=1:length(t)
for j=1:length(n)
F(j)=exp(-((n(j)*pi*v*ta/L).^2)/4);
u(j,:)=sin(n(j)*pi*xs/L)*F(j)*sin(n(j)*pi*x/L)*cos(n(j)*pi*v/L*t(k)); % no loop needed
end
us(k,:) = sum(u);
end
plot(x,us);
##### 3 CommentsShowHide 2 older comments
Adnan Barkat on 27 Jan 2022
Exactly, I want to build a video of all these plot. Thanks for sharing

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