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Hello, I have been trying to surf two parallel circles but data dimensions don't match and I don't know why. Any help would be nice. Thank you, Omar

Asked by Omar Rashed on 6 Oct 2016
Latest activity Commented on by Omar Rashed on 6 Oct 2016
radius = 1; center = [0 0]; theta = linspace(0,2*pi); X = center(1)+radius.*cos(theta); X=[X;X]; Y = center(2)+radius.*sin(theta); Y=[Y;Y]; Z = zeros(size(X));Z=[Z;Z];Z(2,:)=1;surf(X,Y,Z); hold on;

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3 Answers

Answer by elias GR on 6 Oct 2016
 Accepted Answer

Furthermore, surf is not the right command to do what you want. Try the following instead:
fill3(X(1,:),Y(1,:),Z(1,:),'r')
hold on
fill3(X(2,:),Y(2,:),Z(2,:),'b')

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Thanks, I realised surf was wrong as well after it gave me a hollow cylinder. But I didn't get two circles when I used your answer, it gave me one, even after correcting the last line

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Answer by Massimo Zanetti on 6 Oct 2016
Edited by Massimo Zanetti on 6 Oct 2016

You doubled Z, delete the
Z=[Z;Z];
line and everything will be fine.

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Answer by elias GR on 6 Oct 2016
Edited by elias GR on 6 Oct 2016

Erase Z=[Z;Z]; This is not needed because X already have 2 rows and size(X)=[2 100]

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