[Matplotlib-users] Display a scalar as color over a surface

[Philippe P. <phi...@gm...>]

Hello All,
  I have a scalar function (a potential) defined on a 3-dimensional
cartesian space V(x,y,z) and an arbitrary surface (a boundary) set by
the function f(x,y,z)=a. I would like to paint the value of V(x,y,z)
on the surface defined by f in the (x,y,z) domain.
  Specifically I was thinking of rewriting f in the form of Z=f(X,Y)
and plot it with surface plot
   plot_surface(X, Y, Z, cmap=cm.coolwarm)
This give me my boundary surface but its color is set by Z while I
would like if to be set by my other function V evaluated on the
surface.

  Please let me know if any of you have a good suggestion. Thank you,
-- Philippe.