surface plotting selected data

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SAZZAD HOSSAIN 2019-4-13

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评论： David Wilson 2019-4-13

Hello,

I have done a surface mapping. The data is now spread over a 10 by 10 matrix. However, In these 100 points I have data for only 33. How can I 3D-plot to show only these 33 points in the 10 by 10 surface. I tried making the rest of the points zero, but using mesh/surf produces weird planes and make the whole plot very confusing. Any help wiould be appreciated.

Thanks in advance.

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Thomas Rosin 2019-4-13

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Hi Sazzad,

I usually projection my 3d plot onto a 2D surface to visualize my data.

Try this code and tell me if you can see your data better?

temp=yourmatrix
figure
hold(axes('Parent',gcf),'on')
surf(1:10,1:10,temp)
shading(gca,'interp')
colorbar
colormap jet
pbaspect([1 1 1])

David Wilson 2019-4-13

You could try scatteredinterpolant (& friends for the plotting).

I assuming your 33 valid points are scattered within your 10*10 grid in a random manner. That means your valid data is not on a grid, so grid it first, then plot the gridded interpolant. You might also find griddata helpful.

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