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Re: All I get is gray scale [message #29088 is a reply to message #29084]

Thu, 31 January 2002 13:55

Ralf Flicker
Messages: 19
Registered: October 2001

Junior Member

gary.hodgesREMOVE@cires.colorado.edu wrote:
>
> I've read through several historical "color" threads and even bought the book
> (IDL Programming Techniques), but I'm still only able to plot gray scale.
> I've just followed the "Drawing Line Plots in Color" on page 25 of the
> Fanning book without success. The exact commands are (time and curve
> are already defined):
>
> IDL> TVLCT, [70,255,0], [70,255,255], [70,0,0], 1
> IDL> Plot, time, curve, Color=2, Background=1
>
> This produces a black plot window. To see anything I have to increase the
> color value to ~50, with higher values producing progressively less gray
> plots. I gather this goes against what I'm trying to do with the above TVLCT
> command, which is I understand things, to assign three RGB colors to indexes
> 1, 2 and 3.
>
> I have also tried "IDL> Device, Decomposed=0" trick without success.

I always have this problem after a new installation. You might
need to add true_color=24 or pseudo_color=8 to your device
assignment, depending upon what depth your screen is set to. Do
a xdpyinfo to check. HTH.

ralf

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[Message index]

		Re: All I get is gray scale By: Craig Markwardt on Fri, 01 February 2002 02:13
		Re: All I get is gray scale By: David Fanning on Thu, 31 January 2002 16:35
		Re: All I get is gray scale By: gary.hodgesREMOVE on Thu, 31 January 2002 15:56
		Re: All I get is gray scale By: David Fanning on Thu, 31 January 2002 15:29
		Re: All I get is gray scale By: gary.hodgesREMOVE on Thu, 31 January 2002 14:57
		Re: All I get is gray scale By: Ralf Flicker on Thu, 31 January 2002 13:55
		Re: All I get is gray scale By: David Fanning on Thu, 31 January 2002 13:54

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