3D plot from a matrix

[guido.bonalumi]

Hi everyone,
I want to generate a 3D plot from a matrix but I do not know how to do it.
The matrix (30x13) contains the Z values that I want to plot, but this
values are not equally spaced:
- in the X direction I have 30 step of data which I can consider equally
spaced, but I want a scale from 0 to 1 on this axis (it represent a non
dimensional coordinate);
- in the Y direction the coordinates are from 0 to 67.9 but these values are
not equally spaced (0, 6.8, 13.6, 20.4, 27.2, 34, 40.7, 47.5, 52.1, 56.6,
61.1, 65.6, 67.9); still I want the same scale as the X axis (from 0 to 1).
Then I want to use a specific colormap, the blue to red rainbow.

Can anybody help me with this?

Thanks in advance to everyone.



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