Re: Re: 2D-Plot Colorings

*To*: mathgroup at smc.vnet.net*Subject*: [mg54331] Re: [mg54281] Re: [mg54218] 2D-Plot Colorings*From*: DrBob <drbob at bigfoot.com>*Date*: Thu, 17 Feb 2005 10:30:48 -0500 (EST)*References*: <200502161936.OAA19120@smc.vnet.net>*Reply-to*: drbob at bigfoot.com*Sender*: owner-wri-mathgroup at wolfram.com

I think I like Tony's solution better, myself. Some of the details seem obscure, but that's probably because I don't use Plot3D very much. Bobby On Wed, 16 Feb 2005 14:36:00 -0500 (EST), Dr A.H. Harker <a.harker at ucl.ac.uk> wrote: > 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: [mg54331] [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 > > > > > -- DrBob at bigfoot.com www.eclecticdreams.net

**References**:**Re: 2D-Plot Colorings***From:*"Dr A.H. Harker" <a.harker@ucl.ac.uk>