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Re: How To invert ColorFunction

  • To: mathgroup at smc.vnet.net
  • Subject: [mg106744] Re: [mg106719] How To invert ColorFunction
  • From: Bob Hanlon <hanlonr at cox.net>
  • Date: Fri, 22 Jan 2010 05:39:50 -0500 (EST)
  • Reply-to: hanlonr at cox.net

RevolutionPlot3D[c4*z4[rho, theta],
 {rho, 0, 1}, {theta, 0, 2*Pi},
 ColorFunction -> (ColorData["Rainbow"][1 - #3] &)]


Bob Hanlon

---- Vladimir <svetlana_47 at yahoo.de> wrote: 

=============
Hi everybody,

I am plotting Zernike-Polynomials like this:

---------
c4 = 1;

z4[rho_, theta_] := rho^2*Cos[2*theta]

RevolutionPlot3D[c4*z4[rho, theta], {rho, 0, 1}, {theta, 0, 2*Pi},
 ColorFunction -> "Rainbow"]
---------

To be able to compare the plot to measured data from an
interferometer, I would like to invert the Rainbow colouring, that is
red at the bottom and blue on top. However, I can't find to work this
out. Does anyone know how to do this?

Thank you,
 Vladimir.



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