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making a colour map of my intensities, contour not working ?

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Youseff
Youseff 2014-2-25
关闭： MATLAB Answer Bot 2021-8-20
well i have a 64by1 matrix of x and z values, and for each position [x,z] i have an intensity(pressure) at that point so basically another 64by1 matrix of intensities. well what i want is a colour map having the axis (horizental x, vertical z) and showing the distribution of the intensities with the highest being red. contour didnt work saying that Z should be a 2x2 matrix.

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Walter Roberson
Walter Roberson 2014-2-25
gridsize = 100; %as appropriate
F = scatteredInterpolant(x, z, intensities);
[X, Z] = ndgrid( linspace( min(x), max(x), gridsize), linspace( min(z), max(z), gridsize) );
gIntensities = F(X, Z);
contour(X, Z, gIntensities)
or perhaps you were looking for a histogram? If so look in the File Exchange for hist2()

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