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MathGroup Archive 2005

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Re: 2D-Plot Colorings

  • To: mathgroup at smc.vnet.net
  • Subject: [mg54239] Re: [mg54218] 2D-Plot Colorings
  • From: DrBob <drbob at bigfoot.com>
  • Date: Mon, 14 Feb 2005 00:57:54 -0500 (EST)
  • References: <200502140317.WAA14068@smc.vnet.net>
  • Reply-to: drbob at bigfoot.com
  • Sender: owner-wri-mathgroup at wolfram.com

Here's the simplest solution I can think of:

DisplayTogether[Plot[x^2,
     {x, -1, -Sqrt[0.4]}, PlotStyle -> Blue],
    Plot[x^2, {x, -Sqrt[0.4], -Sqrt[0.2]},
     PlotStyle -> {AbsoluteThickness[2],
       Red}], Plot[x^2, {x, -Sqrt[0.2],
      Sqrt[0.2]}, PlotStyle -> Blue],
    Plot[x^2, {x, Sqrt[0.2], Sqrt[0.4]},
     PlotStyle -> {AbsoluteThickness[2],
       Red}], Plot[x^2, {x, Sqrt[0.4], 1},
     PlotStyle -> Blue]];

Bobby

On Sun, 13 Feb 2005 22:17:05 -0500 (EST), Bruce Colletti <vze269bv at verizon.net> wrote:

> Re Mathematica 5.1.
>
> In plotting y = x^2 over [-1,1], I want to color red those points whose y-values are in [0.2, 0.4].  All others are blue.
>
> Although I can do this by manipulating the FullGraphics object or by displaying separate plots, is there an easier way via some Plot option?  ColorFunction doesn't seem to work (probably user error), and neither does the Plot3D convention in which shading is co-declared with the function.
>
> Thankx.
>
> Bruce
>
>
>
>



-- 
DrBob at bigfoot.com
www.eclecticdreams.net


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