Surf 3D Matrix size issue

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Lucas Junghans
Lucas Junghans 2020-5-4
评论： Ameer Hamza 2020-5-5
Hello everyone,
currently i try to understand some code i got from my supervisor in college. My task is to create a 3D plot. I've got vector V.x with dimension 1x41 and a vector V.y with dimension 1x41 as well. Besides that i got a 3D Matrix E with the dimension 41x41x301.
I tried to use surf(V.x,V.y,E).
I get an error because of the dimensions must agree.
Where is the Problem? Is it because of the "x301", because E is a 3D Matrix?
If so, how can i fix it?
Sincerely
Lucas

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Ameer Hamza
Ameer Hamza 2020-5-4
Yes, It is because of 3D array. Are you trying to create 301 surfaces? You can plot a single surface like this
surf(V.x, V.y, E(:,:,1))
To plot all 301 surfaces on single axes, use for loop
n = size(E,3);
figure;
ax = axes();
hold(ax)
for i=1:n
surf(V.x, V.y, E(:,:,i));
end
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Lucas Junghans
Lucas Junghans 2020-5-5
Ok. I guess i just solved my problem thanks to your answer :)
So thanks again.
n = size(E,3);
ax = axes();
hold(ax)
for i=1:n
surf(V.x, V.y, abs(squeeze(E(:,:,i).^2)),angle(squeeze(E(:,:,i).^2)));
end
Ameer Hamza
Ameer Hamza 2020-5-5
I am glad to be of help.
Yes. You can use surf to display a 4th-dimensional value on a surface.

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