How to I plot 3D level surfaces of this 4D function?

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Jessica Peterson
Jessica Peterson on 13 Nov 2019
Commented: Walter Roberson on 13 Nov 2019
I have the following function. I wish to plot the 3D surface of the function when density equals 100000, 80000, 60000, 40000. I am unsure how to plot a function of 3 variables. Thanks
density= @(x,y,z)10.^5 -24000.*z + 10.^4.*sech((0.75.*x-1.5).^2+(y-1).^2)

Answers (1)

Walter Roberson
Walter Roberson on 13 Nov 2019
Use ndgrid or meshgrid to create a 3D grid of x, y, z locations, and evaluate the function at those points . Suppose we call the result D .
Now use
arrayfun(@(LEVEL) isosurface(x, y, z, D, LEVEL), [100000, 80000, 60000, 40000]);
It is not possible to pass multiple levels to isosurface() in one call.
Walter Roberson
Walter Roberson on 13 Nov 2019
Grab the plot with your cursor and rotate it. Or give the command

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