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MathGroup Archive 2005

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Re: ArrayPlot: ColorRules v. ColorFunction

  • To: mathgroup at smc.vnet.net
  • Subject: [mg57962] Re: ArrayPlot: ColorRules v. ColorFunction
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Tue, 14 Jun 2005 05:10:26 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, England
  • References: <d8jli2$stv$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Bruce Colletti wrote:
> Re Mathematica 5.1 under WinXP.
> 
> T is a 5x5 matrix of numbers.
> 
> Using ArrayPlot, how would I display the colored array, where entries in [0, 0.3], (0.3,0.5] and (0.5,1] are Red, White and Blue respectively (default color is green for values outside [0,1])?  
> 
> Thanks.
> 
> Bruce
> 
Hi Bruce,

You must to define your own color function as in the following line

In[1]:=
ArrayPlot[T, ColorFunction ->
     (Which[0 <= #1 <= 0.3, Red,
           0.3 < #1 <= 0.5, White,
           0.5 < #1 <= 1, Blue,
           True, Green] & )];

Best regards,
/J.M.


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