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Re: How To invert ColorFunction

  • To: mathgroup at smc.vnet.net
  • Subject: [mg106723] Re: [mg106719] How To invert ColorFunction
  • From: "van der Burgt, Maarten" <Maarten.VanDerBurgt at icos.be>
  • Date: Fri, 22 Jan 2010 05:35:44 -0500 (EST)
  • References: <201001211131.GAA20635@smc.vnet.net>

Vladimir,

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

does the job.

regards,

Maarten

-----Original Message-----
From: Vladimir [mailto:svetlana_47 at yahoo.de]
Sent: Thursday, 21 January, 2010 12:31
To: mathgroup at smc.vnet.net
Subject: [mg106723] [mg106719] How To invert ColorFunction

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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