sequence of color on a surf plot

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I wanted a sequence of colour for my Z axis from min to max.
The plot is still plain black after the code below. How can i fix this?
surf(value)
colormap hsv

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John D'Errico
John D'Errico 2022-7-9
编辑:John D'Errico 2022-7-9
Surf plots each grid line, as a BLACK line. The black lines are useful, and help you to see the shape of the surface for smaller grids. But they are a problem if you have too many lines. If you have a LARGE array to plot, then the black lines dominate what you see, and you see nothing but black. For example:
Z = rand(500,500);
surf(Z)
But we also can plot it without the grid lines.
surf(Z,'edgecolor','none')
  3 个评论
John D'Errico
John D'Errico 2022-7-9
NO. Why would they be? Look at the examples in the help docs for surf. Or try a smaller example yourself.
Z = reshape(1:12,3,4)
Z = 3×4
1 4 7 10 2 5 8 11 3 6 9 12
surf(Z)
colormap pink
The black lines are now visible. As you can see, they connect the vertices in the lattice as drawn. Z was a 3x4 array.
mesh(Z)
The problem is when you have a huge surface, then the black lines dominate as I showed in my answer.

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