| Color Data with Colorbar OOB Colors [message #86785] |
Tue, 03 December 2013 12:01  |
morganlsilverman
Messages: 46
Registered: February 2013
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Hello,
I'm trying to color a selection of the data I've plotted but am having a hard time getting the color bar and data colors to match correctly. I've plotted data that has altitudes from 0-5 km but only want to have a range of colors from 0-2 km and have everything above 2 km the same last color bar value (color 256). I've created a color bar with 256 colors from 0-2, but I can't seem to get this to match the colors of the data in the figure. Any suggestions. Thank you.
Sincerely,
Morgan
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| Re: Color Data with Colorbar OOB Colors [message #86787 is a reply to message #86786] |
Tue, 03 December 2013 16:17  |
morganlsilverman
Messages: 46
Registered: February 2013
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Member |
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On Tuesday, December 3, 2013 5:19:21 PM UTC-5, David Fanning wrote:
> Morgan Silverman writes:
>
>
>
>> I'm trying to color a selection of the data I've plotted but am having a hard time getting the color bar and data colors to match correctly. I've plotted data that has altitudes from 0-5 km but only want to have a range of colors from 0-2 km and have everything above 2 km the same last color bar value (color 256). I've created a color bar with 256 colors from 0-2, but I can't seem to get this to match the colors of the data in the figure. Any suggestions
>
>
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> Are you by any chance talking about a filled contour plot? If so, have
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> you read this article?
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> http://www.idlcoyote.com/cg_tips/oobcontour.php
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>
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> If not, maybe you could get us a better idea of what you are doing so we
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> would have basis for answering your question. :-)
>
>
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> Cheers,
>
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> David
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>
>
> --
>
> David Fanning, Ph.D.
>
> Fanning Software Consulting, Inc.
>
> Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
>
> Sepore ma de ni thue. ("Perhaps thou speakest truth.")
I apologize for not being clear. No this is not a contour plot. I am plotting individual latitude vs longitude points as symbols. I want each of those points colored by the corresponding altitude but only colored up to 2 km, above they should all be the same color. I still need to be able to see all points though. When I tried to limit, I also limit plotting the locations above 2 km. I've included a bit of plotting code. I hope this helps. Thank you.
loadct, 33
lonrange = [-77.75, -75.5] ; Flight 7,8,9,12,13,14
latrange=[38.25, 40] ; Flight 7,8,9,12,13,14
limit = [latrange(0),lonrange(0),latrange(1),lonrange(1)]
pp=[0.1,0.1,0.82,0.95]
colors=bytscl(DAQalt)
cgplot, DAQlon, DAQlat, /nodata, xstyle=1, ystyle=1, xrange=lonrange, yrange=latrange, position=pp,/noerase
position=pp,/noerase
cgMap_set, 38.25, -76.5, limit=limit, /lambert, /noerase, position=pp ;37,-76.35 for zoomed in...37.2, -76.7 zoomed out
cgMap_GSHHS, ShoreData, Fill=1, Level=3, Color='black', /Outline
cgplots, DAQlon, DAQlat, psym=2, color=colors
cgColorbar, divisions=4, range=[0,2], /Vertical, /right, charsize=1, position=[0.83,0.1,0.86,0.9]
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| Re: Color Data with Colorbar OOB Colors [message #86788 is a reply to message #86787] |
Tue, 03 December 2013 16:36 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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Morgan Silverman writes:
> I apologize for not being clear. No this is not a contour plot. I am plotting individual latitude vs longitude points as symbols. I want each of those points colored by the corresponding altitude but only colored up to 2 km, above they should all be the same color. I still need to be able to see all points though. When I tried to limit, I also limit plotting the locations above 2 km. I've included a bit of plotting code. I hope this helps
I would do it like this:
DAQlon = cgScaleVector(Randomu(seed, 100), -75.5, -77.75)
DAQLat = cgScaleVector(Randomu(seed, 100), 38.25, 40.0)
DAQAlt = cgScaleVector(Randomu(seed, 100), 0.0, 3.0)
shoredata = 'gshhs_i.b'
tooHigh = Where(DAQAlt GT 2.0, count)
colors=bytscl(DAQalt, Top = 254)
IF count GT 0 THEN colors[tooHigh] = 255
cgLoadCT, 33, NColors=254
TVLCT, cgColor('charcoal', /Triple), 255
lonrange = [-77.75, -75.5] ; Flight 7,8,9,12,13,14
latrange=[38.25, 40] ; Flight 7,8,9,12,13,14
limit = [latrange(0),lonrange(0),latrange(1),lonrange(1)]
pp=[0.1,0.1,0.82,0.95]
cgplot, DAQlon, DAQlat, /nodata, xstyle=1, ystyle=1, $
xrange=lonrange, yrange=latrange, position=pp
cgMap_set, 38.25, -76.5, limit=limit, /lambert, $
/noerase, position=pp ;37,-76.35 for zoomed in...37.2, -76.7 zoomed
out
cgMap_GSHHS, ShoreData, Fill=1, Level=3, Color='black', /Outline
cgplots, DAQlon, DAQlat, psym=2, color=colors
cgColorbar, divisions=4, range=[0,2], /Vertical, /right, $
charsize=1, position=[0.83,0.1,0.86,0.9], NColors=254, $
OOB_High='charcoal'
END
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")
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| Re: Color Data with Colorbar OOB Colors [message #86789 is a reply to message #86788] |
Tue, 03 December 2013 16:49 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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David Fanning writes:
> I would do it like this:
I forgot to mention, I spent about a half hour working on this for you.
Total love for the week so far: $10.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")
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