| Re: switch colortable [message #31820] |
Thu, 22 August 2002 20:24  |
tom
Messages: 28
Registered: April 1995
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Junior Member |
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Thanks. A very simple contour plot is as following:
levels=12
LoadCT, 0, Bottom=1,NColors=levels
; TVLCT, r, g, b, /Get
;TVLCT, Reverse(r), Reverse(g), Reverse(b)
maxp=max(peak,/nan) & minp=min(peak,/nan)
step = (Maxp - Minp) / levels
userLevels = IndGen(levels) * step + Minp
; Draw a colorbar.
Contour,
peak,x,y,/cell_fill,Background=white,C_Colors=Indgen(levels) +1,Levels=userLe
vels
I hope the color at maximum is black. Your suggestion sems does not help.
Tom
"David Fanning" <david@dfanning.com> д����Ϣ����
:MPG.17ce8849b6fe4f2e989973@news.frii.com...
> tom (tom2959@21cn.com) writes:
>
>> Some the colortables(loadct,0,1...) have colors vary from some
>> color(black,blue,...) to white linearly. But I hope the colortable
changing
>> from white to some color(black,...). Then when I plot contour, the
maximun
>> peaks can display clearly. How to do that then?
>
> Here is one way:
>
> TVLCT, r, g, b, /Get
> TVLCT, Reverse(r), Reverse(g), Reverse(b)
>
> Another way is to start XLOADCT, then grab the
> Stretch Top thingy and drag it all the way to
> the left, and drag the Stretch Bottom thingy
> all the way to the right. Hit the DONE button.
>
> Cheers,
>
> David
>
> --
> David W. Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Phone: 970-221-0438, E-mail: david@dfanning.com
> Coyote's Guide to IDL Programming: http://www.dfanning.com/
> Toll-Free IDL Book Orders: 1-888-461-0155
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| Re: switch colortable [message #31834 is a reply to message #31820] |
Thu, 22 August 2002 05:34  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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tom (tom2959@21cn.com) writes:
> Some the colortables(loadct,0,1...) have colors vary from some
> color(black,blue,...) to white linearly. But I hope the colortable changing
> from white to some color(black,...). Then when I plot contour, the maximun
> peaks can display clearly. How to do that then?
Here is one way:
TVLCT, r, g, b, /Get
TVLCT, Reverse(r), Reverse(g), Reverse(b)
Another way is to start XLOADCT, then grab the
Stretch Top thingy and drag it all the way to
the left, and drag the Stretch Bottom thingy
all the way to the right. Hit the DONE button.
Cheers,
David
--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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| Re: switch colortable [message #31918 is a reply to message #31820] |
Thu, 22 August 2002 20:48 |
David Fanning
Messages: 11724
Registered: August 2001
|
Senior Member |
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tom (tom2959@21cn.com) writes:
> Thanks. A very simple contour plot is as following:
>
> levels=12
> LoadCT, 0, Bottom=1,NColors=levels
> ; TVLCT, r, g, b, /Get
> ;TVLCT, Reverse(r), Reverse(g), Reverse(b)
>
> maxp=max(peak,/nan) & minp=min(peak,/nan)
> step = (Maxp - Minp) / levels
> userLevels = IndGen(levels) * step + Minp
> ; Draw a colorbar.
> Contour,
> peak,x,y,/cell_fill,Background=white,C_Colors=Indgen(levels) +1,Levels=userLe
> vels
>
> I hope the color at maximum is black. Your suggestion sems does not help.
Ah, well, you are changing the problem on me. :-)
Try this:
levels=12
LoadCT, 0, Bottom=1,NColors=levels
TVLCT, r, g, b, /Get
TVLCT, Reverse(r[1:12]), Reverse(g[1:12]), Reverse(b[1:12]), 1
Cheers,
David
--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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