Contour plot of XYZ data

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LukeJes 2020-12-29

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评论： Ameer Hamza 2020-12-30

hfm.mat

Hi,

I have attached X(:,1)Y(:,2)Z(:,3) data from which I would like to create a 2D contour plot. Thank you in advance for any help.

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回答（1 个）

Ameer Hamza 2020-12-30

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https://ww2.mathworks.cn/matlabcentral/answers/704973-contour-plot-of-xyz-data#answer_586933

编辑：Ameer Hamza 2020-12-30

在 MATLAB Online 中打开

Try this

x = hfm(:,1);
y = hfm(:,2);
z = hfm(:,3);
xg = linspace(min(x),max(x));
yg = linspace(min(y),max(y));
[Xg, Yg] = meshgrid(xg, yg);
Zg = griddata(x, y, z, Xg, Yg);
contour(Xg, Yg, Zg)

or following if you want to extrapolate the data too

x = hfm(:,1);
y = hfm(:,2);
z = hfm(:,3);
xg = linspace(min(x),max(x));
yg = linspace(min(y),max(y));
[Xg, Yg] = meshgrid(xg, yg);
mdl = scatteredInterpolant(x, y, z);
Zg = mdl(Xg, Yg);
contour(Xg, Yg, Zg)