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PLOTs with colour regions
- Subject: PLOTs with colour regions
- From: philaldis(at)geocities.com (Phil Aldis)
- Date: Mon, 22 Mar 1999 14:44:41 GMT
- Newsgroups: comp.lang.idl-pvwave
- Organization: Defence Evaluation & Research Agency
- Reply-To: philaldis(at)geocities.com
- Xref: news.doit.wisc.edu comp.lang.idl-pvwave:14021
I was wondering if people have had to do this in the past, and so have
written something to do it.
I'm wanting to plot some data, and at a certain threshold value, the
line colour must turn from being say white to red. That is to say I
don't just want to plot the data points above the threshold in red and
those below in white, I also want the connecting lines to be a
different colour as well.
The only way I could do it is as follows:
PLOT, data, /NODATA, POSITION=[0.2,0.2,0.8,0.8], yrange=[-4,4],
PLOT, data, /NOERASE, yrange=[0,4], ystyle=5,
POSITION=[0.2,0.5,0.8,0.8], COLOR=130, xstyle=4
PLOT, data, /NOERASE, yrange=[-4,0], ystyle=5,
POSITION=[0.2,0.2,0.8,0.5], COLOR=255, xstyle=4
.......or something roughly like that - I'm trying desperately to
remember the commands.
Anyway that's a bit messy really to hev in a general format and I was
wondering if anyone's got a better way or has done it before?