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Help with plotting 2d and oscillation

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Jacob Andréasson
Jacob Andréasson 2019-11-9
Skärmavbild 2019-11-09 kl. 17.33.06.png
Hey!
I need som help with the script for exercise C. I dont know if i have understood the exercise right and i would love som help if my scipt is correct.
Here is my script:
%% Exercise 2.a
clear
clf
clc
k=1
L=6
x=linspace(0,L);
fplot(@(x) (((2.*k)./L).*x), [0,(L/2)])
hold on
fplot(@(x) (((2.*k)./L).*(L-x)), [(L/2),L])
%% Exercise 2.b
clear
clf
clc
k=1;
L=6;
T=10;
x=linspace(0,L,100); t=linspace(0,T,100);
n=1:100;
for i=1 : length(x)
for j=1 : length(t)
u(i,j)=(8/(pi^2)).*sum((1./(n.^2)).*sin(n.*pi/2).*cos(n.*pi.*t(j)/6).*sin(n.*pi.*x(i)/6));
end
end
surf(t,x,u)
xlabel('t'); ylabel('x'); zlabel('u')
title('Exercise 2.b');
%% Exercise 2.c
clear
clf
clc
k=1;
L=6;
T=10;
x=linspace(0,L,100); t=linspace(0,T,100);
n=1:100;
for i=1 : length(x)
for j=1 : length(t)
u(i,j)=(8/(pi^2)).*sum((1./(n.^2)).*sin(n.*pi/2).*cos(n.*pi.*t(j)/6).*sin(n.*pi.*x(i)/6));
end
end
plot(x,u)
xlabel('x'); ylabel('u');
title('Exercise 2.c');

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