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Plotting experimental data

Most of matlab's 3D facilities expect the data to be evenly spaced on the XY plane, but what if you have some scattered experimental data? First you need to interpolate the data. Suppose you have your datapoints in 3 arrays: x, y, and z. Then the following will extrapolate the data onto a coarse 10 by 10 grid and display a colour-coded surface.
 xi=linspace(min(x), max(x), 10);
 yi=linspace(min(y), max(y), 10);
 [X, Y]=meshgrid(xi,yi);
 shading interp;

There's also contour, scatter3, waterfall, slice and ezplot. The colormap command controls palettes. Type help graph3d for details.

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Information provided by Tim Love