Re: 2D-Plot Colorings

*To*: mathgroup at smc.vnet.net*Subject*: [mg54281] Re: [mg54218] 2D-Plot Colorings*From*: "Dr A.H. Harker" <a.harker at ucl.ac.uk>*Date*: Wed, 16 Feb 2005 14:36:00 -0500 (EST)*Sender*: owner-wri-mathgroup at wolfram.com

You can use the Plot3D conventions, and with a little tweaking get a reasonable-looking graph, with hh[z_] = If[(z > .2) && (z < .4), RGBColor[0, 0, 1], RGBColor[1, 0, 0]] Plot3D[x^2, {x, -1, 1}, {y, 0.005, .01}, ColorFunction -> hh, BoxRatios -> {1, .01, 1}, ColorFunctionScaling -> False, ViewPoint -> {0, -0.5, 0}, Ticks -> {Automatic, False, Automatic}, Mesh -> False, Lighting -> False]; Which has the merit of not requiring multiple plots, but would require the viewpoint to be tailored to the problem at hand. I prefer the solutions previously posted by David Park and DrBob, of course, but thought this might be fun. Tony Harker Department of Physics and Astronomy University College London Gower Street LONDON WC1E 6BT (44)(0)207 679 3404 a.harker at ucl.ac.uk ]->-----Original Message----- ]->From: Bruce Colletti [mailto:vze269bv at verizon.net] To: mathgroup at smc.vnet.net ]->Sent: 14 February 2005 03:17 ]->To: mathgroup at smc.vnet.net ]->Subject: [mg54281] [mg54218] 2D-Plot Colorings ]-> ]->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

**Follow-Ups**:**Re: Re: 2D-Plot Colorings***From:*DrBob <drbob@bigfoot.com>