Problem with fsurf (where is the controur?)

using:

f = @(x,y) (x^0.3)*(y^0.3)
fsurf(f,[0,10],'ShowContours','on')

but I do not seem to get the countour below the surface, only the surface. Why?

Answer 1

[Walter Roberson]

When I try in R2019a, the contour is there, but you need to rotate the plot to see it as it is underneath the surface.

[Rene Wells]

OK I see what you mean as I rotate with the mouse I can see the contour bel;ow teh surface. Thanks.

But how can I get to see both without rotating, i.e. by creating a gap between the surface and the contour? But how?

[Walter Roberson]

surface plots are not compatible with gaps.

You can draw a surface plot and contour3() on top of it. That would require that you create a grid of function values to contour3()

You could fsurf() and set the Alpha (transparency) of it fairly low so that you could see the contour lines underneath.

f = @(x,y) (x.^0.3).*(y.^0.3);
[X,Y] = meshgrid(linspace(0,10));
Z = f(X,Y);
surf(X, Y, Z, 'edgecolor', 'none')
alpha 0.5
hold on
contour(X, Y, Z);
hold off