How to create a continuos surface in 3D

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Francesco
Francesco 2014-4-6
评论： Francesco 2014-4-6
Hi, I have this .mat file that is a 8950x3 matrix, the 1st column contains the x-coordinates, the 2nd one the y-coordinates and the third contains the z-coordinates. I would draw a continuos surface like the following figure
The only difference is that z is not the result of a function but is a vector. Is it possible? Thanks to all!

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Mischa Kim
Mischa Kim 2014-4-6
How about doing it from scratch?
x = -2:0.1:2;
y = -2:0.1:2;
[X,Y] = meshgrid(x,y);
Z = X.*exp(-(X - Y.^2).^2 - Y.^2);
surf(X,Y,Z)
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Mischa Kim
Mischa Kim 2014-4-6
Yes it is. If you want to generate directly from the matrix from the .mat file, this should work:
M = sortrows(m,[1 2]) % m is the matrix from the .mat file
nc = numel(unique(M(:,1)));
x = reshape(M(:,1),[],nc);
y = reshape(M(:,2),[],nc);
z = reshape(M(:,3),[],nc);
surf(x,y,z)

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Youssef Khmou
Youssef Khmou 2014-4-6
Try to use this method :
% X is the 8950*3 matrix
x=X(:,1)'*X(:,1); % 8950x8950
y=X(:,2)'*X(:,2);
z=X(:,3)'*X(:,3);
figure; surf(X,Y,Z)
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Francesco
Francesco 2014-4-6
I noticed right now that no one among x y and z are matrices but scalar value

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