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MathGroup Archive 2000

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Re: Problem with Rasters & Density Plots

  • To: mathgroup at smc.vnet.net
  • Subject: [mg21414] Re: Problem with Rasters & Density Plots
  • From: Harald Giese <giese at dkrz.de>
  • Date: Thu, 6 Jan 2000 01:46:31 -0500 (EST)
  • Organization: Institut fuer Meereskunde, Universitaet Hamburg
  • References: <84plkm$lt8@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

KCConnolly at aol.com wrote:
> 
> I'm running Mathematica 3.0, and have just noticed that the Raster, Raster
> Array, and Density Plot commands return all black graphics, regardless of the
> color directives I use.  I would assume that I'm doing something wrong, but
> for the fact that the graphics for these topics in my interactive version of
> the Mathematica book also turn up all black.  All other graphics (contour
> graphics, 3D graphics, etc.) work fine:  it's just these that are a problem.
> 
> I haven't had occasion to use these features since I upgraded (?) my
> operating system from Win 95 to Win 98 a month ago, so I'm not sure if it's
> related to that, to Y2K, or some other reason.  Any suggestions would be very
> much appreciated.
> 
> Kevin Connolly


Hi Kevin,
have you looked at http://support.wolfram.com ?

There quite a lot FAQs, eg.: Graphics/Contour.Density/DensityBlack.html
:



How do I render DensityGraphics so that I don't get an entirely black
    image? 



    Try the following if your DensityGraphics (created by DensityPlot or
    ListDensityPlot) appears as all-black graphics. 

         The Mesh may be so tight that it covers the graphic. Try using
the option Mesh ->
         False. 

         Under Windows, the display may be set to a color setting that
causes a PostScript
         error. Go to the settings in the Display Control Panel. 

         Start|Settings|Control Panels|Display|Setting

         Change the setting for number of colors. High Color(16-bit)
should resolve the error.

                             Last modified on Dec 28, 1999. 
               Questions or comments about this FAQ? Email
support at wolfram.com.


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