How to plot 3D surface with vector-input function?
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I have a function that takes array inputs as arguments.
FUN = @(x) = x(1).^2+x(2).^2
When I try to use fsurf (ie. fsurf(FUN) or fsurf(FUN,[0 100 0 100])), the surface will not plot, and an error will appear (Error updating FunctionSurface).
surf or meshgrid don't work either.
What can I do to have this function plot, instead of un-vectorizing the handle (ie. FUN = @(x1,x2) x1.^2+x2.^2)?
采纳的回答
Star Strider
2020-8-6
The function you coded:
FUN = @(x) = x(1).^2+x(2).^2;
will only take the first 2 elements of ‘x’ (whatever it is), and will return a scalar.
You need to restate it as:
FUN = @(x1,x2) x1.^2+x2.^2;
for example, to produce a surface:
[X1,X2] = meshgrid(-1:0.5:1);
figure
surf(X1, X2, FUN(X1,X2))
grid on
.
2 个评论
ejk
2020-8-7
Star Strider
2020-8-7
That is correct.
I could not devise a way to do it otherwise, and I doubt that one exists.
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