how to form a 3D surface with several points whose coordinate in x,y,z axis is known

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Seemab Khan 2017-11-18

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关闭： MATLAB Answer Bot 2021-8-20

X = [0 5 0 5 2.5 0.417 2.5 4.58 0.417 2.5 4.58 2.5] Y = [0 0 5 5 0.154 1.668 1.698 1.668 3.33 3.30 3.33 4.845] Z = [0 2 2 0 1 0.68 1 1.3125 1.3125 1 1.6875 1] %% these are the coordinates given, i want to make surface using above coordinates thanks in advance

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Answer 1

Star Strider 2017-11-18

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One approach (using griddata interpolation):

X = [0 5 0 5 2.5 0.417 2.5 4.58 0.417 2.5 4.58 2.5];
Y = [0 0 5 5 0.154 1.668 1.698 1.668 3.33 3.30 3.33 4.845];
Z = [0 2 2 0 1 0.68 1 1.3125 1.3125 1 1.6875 1];
Xq = linspace(min(X(:)), max(X(:)), 20);
Yq = linspace(min(Y(:)), max(Y(:)), 20);
[Xg,Yg] = meshgrid(Xq, Yq);
Zg = griddata(X, Y, Z, Xg, Yg);
figure(1)
surfc(Xg, Yg, Zg)
grid on