Services & Resources / Wolfram Forums / MathGroup Archive
-----

MathGroup Archive 2009

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: SphericalPlot3D ColorFunction problem

  • To: mathgroup at smc.vnet.net
  • Subject: [mg104708] Re: [mg104653] SphericalPlot3D ColorFunction problem
  • From: "David Park" <djmpark at comcast.net>
  • Date: Sat, 7 Nov 2009 06:50:01 -0500 (EST)
  • References: <18346782.1257503749659.JavaMail.root@n11>

Porscha,

You have to use a correct list of arguments in the ColorFunction. I think
this is similar to ParametricPlot3D in the argument list.

SphericalPlot3D[Abs[Cos[t]], {t, 0, Pi}, {p, -Pi, Pi}, 
 ColorFunction -> Function[{x, y, z, t, p}, Hue[Arg[Cos[t]]/(2. Pi)]],
  ColorFunctionScaling -> False]


David Park
djmpark at comcast.net
http://home.comcast.net/~djmpark/  


From: Porscha Louise McRobbie [mailto:pmcrobbi at umich.edu] 


Hello,

Can anyone explain why the following simple plot is a single color?

SphericalPlot3D[Abs[Cos[t]], {t, 0, Pi}, {p, -Pi, Pi},
  ColorFunction -> Function[{t}, Hue[Arg[Cos[t]]/(2. Pi)]],
  ColorFunctionScaling -> False]

Arg[Cos[t]]/(2. Pi)] should be zero for t<Pi/2, and 0.5 for t>Pi/2, so  
I expect the the upper lobe of the plot to be red (Hue[0]) and the  
lower lobe to be cyan (Hue[0.5]).  Is there something different about  
ColorFunctions in SphericalPlot3D compared with Plot3D?

Any help is greatly appreciated!

Porscha




  • Prev by Date: Re: SphericalPlot3D ColorFunction problem
  • Next by Date: Re: Mysterious Output in formatted Notebook
  • Previous by thread: Re: SphericalPlot3D ColorFunction problem
  • Next by thread: Re: SphericalPlot3D ColorFunction problem