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Re: Problem with Rasters & Density Plots

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  • Subject: [mg21403] Re: [mg21392] Problem with Rasters & Density Plots
  • From: John Fultz <jfultz at>
  • Date: Tue, 4 Jan 2000 02:12:35 -0500 (EST)
  • Sender: owner-wri-mathgroup at

You are probably running Mathematica 3.0.1 with your scrren depth set
to 24-bit.  There was a bug in 3.0.1 for Windows which caused this
behavior only in 24-bit mode.  It's possible that your video driver
supports 32-bit mode, which would work around this problem at no loss
of color resolution; otherwise, you could switch to 16-bit mode.  To
switch color depths, open the Display control panel, go to the
Settings tab, and change the Color Palette dropdown to the desired

If this seemed to work before, it is because your old Win95 setup
must have used a different color depth.

Rest assured that it is has nothing to do with Y2K.


John Fultz
jfultz at
User Interface Group
Wolfram Research, Inc.

> 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

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