| about contour tracing method [message #9822] |
Mon, 18 August 1997 00:00  |
dpjang
Messages: 1
Registered: August 1997
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Junior Member |
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I am willing to make segmentation procedure.
but I met a problem about Contour Tracing method.
If anyone have a solution or procedure, There is a reply !!!
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| Re: about contour [message #28252 is a reply to message #9822] |
Tue, 27 November 2001 17:23  |
R.Bauer
Messages: 1424
Registered: November 1998
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Senior Member |
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tom wrote:
>
> Hi,I will plot a contour for Z=f(X,Y),
> contour,Z,X,Y
> I hope only area in which Z<0 to be filled, how to do that?
>
> thanks,
>
> Tom.
Dear Tom,
I hope David will answer it in more detail.
As I remember right there are many possibilities.
e.g. NLEVELS=0
and LEVELS= a vector of the levels you are interested in
or MIN and MAX of the datarange is useful too.
? contour
for explaination about the keywords
May be later on this morning after I am back I will add some more
details myself.
regards
Reimar
--
Reimar Bauer
Institut fuer Stratosphaerische Chemie (ICG-1)
Forschungszentrum Juelich
email: R.Bauer@fz-juelich.de
http://www.fz-juelich.de/icg/icg1/
============================================================ ======
a IDL library at ForschungsZentrum Juelich
http://www.fz-juelich.de/icg/icg1/idl_icglib/idl_lib_intro.h tml
http://www.fz-juelich.de/zb/text/publikation/juel3786.html
============================================================ ======
read something about linux / windows
http://www.suse.de/de/news/hotnews/MS.html
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| Re: about contour [message #28254 is a reply to message #9822] |
Tue, 27 November 2001 17:27 |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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tom (tom2959@21cn.com) writes:
> Hi,I will plot a contour for Z=f(X,Y),
> contour,Z,X,Y
> I hope only area in which Z<0 to be filled, how to do that?
Try something like this:
LoadCT, 5, NColors=12, Bottom=1
levels = 12
step = (0 - Min(z)) / levels
userLevels = IndGen(levels) * step + Min(z)
Contour, z, x, y, /Fill, C_Colors=Indgen(levels)+1, Levels=userLevels
Contour, z, x, y, /Overplot, Levels=userLevels, /Follow
There are quite a few articles about filled contour
plots on my web page. You really should read them
before you go too much further. :-)
http://www.dfanning.com/documents/tips.html#Graphics2d
Cheers,
David
--
David W. Fanning, Ph.D.
Fanning Software Consulting
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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