Re: rescale gray levels with ListDensityPlot
- To: mathgroup at smc.vnet.net
- Subject: [mg74474] Re: rescale gray levels with ListDensityPlot
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Thu, 22 Mar 2007 01:18:07 -0500 (EST)
- Organization: The Open University, Milton Keynes, UK
- References: <etqo96$14k$1@smc.vnet.net>
Benoit Scheid wrote: > Hi, > I have a two-dimensional list of data with positive and negative values. > I'm using ListDensityPlot and ListCoutourPlot. > By defaullt, the range of gray levels codes the range of z-values from > -z_min (black) to z_max (white). > I would like to have the zero gray level (black) for z=0 and the maximum > gray level (white) for z=|zmax|. At the same time, I would like to use > two different colors to discriminate between positive and > negative values. Is that possible? > Thanks, > Ben > > The option *ColorFunction* is what you are looking for. See http://documents.wolfram.com/mathematica/functions/ColorFunction Regards, Jean-Marc