| Re: Problem with labeling contour lines in IDL [message #65428] |
Wed, 04 March 2009 12:46  |
David Fanning
Messages: 11724
Registered: August 2001
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Senior Member |
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ed.schmahl@gmail.com writes:
> Maybe I'm doing something different, but this little script in Direct
> Graphics seems to produce nonlinear annotation almost correctly:
>
> d=3Dshift(dist(100),50,50)
> g=3Dexp(-d^2/400)
> c_annotat=3D['0.1','0.2','0.4','0.8','1.6','3','6','12','25' ,'50','98']
> lev =3D max(g)* float(c_annotat)/100.
> contour,g,c_annot=3Dc_annotat,lev=3Dlev
>
> The only thing wrong that I can see is that the .98 label doesn't
> appear, but all the other contours are labeled properly.
I think the word "linear" in Nusret's post was a red herring.
I like to think that contours need to be "long enough" to
be interrupted by a break for a contour label. What "long
enough" means is unclear, but I know for a fact we have no
control over it. In this case, you would see a contour label
for the 0.98 contour, if you made your window twice as big.
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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| Re: Problem with labeling contour lines in IDL [message #65430 is a reply to message #65428] |
Wed, 04 March 2009 12:34  |
ed.schmahl
Messages: 11
Registered: October 2008
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Junior Member |
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On Mar 4, 7:10 am, David Fanning <n...@dfanning.com> wrote:
> Nusret Sevin writes:
>> I have a problem with labeling contour lines in IDL:
>> ...
>> Is there a way that I can force IDL to put labels on nonlinear parts?
>
> You have almost no control over contour line labeling
> in IDL direct graphics. If you want control, you are
> going to have to switch to object graphics. If I were
> going to do this, I would start with something like
> XContour, which is very old and needs to be updated,
> but which has many of the parts you will need already
> in place. Perhaps you can update it for the rest of us. :-)
>
> http://www.dfanning.com/programs/xcontour.pro
Nusret, David,
Maybe I'm doing something different, but this little script in Direct
Graphics seems to produce nonlinear annotation almost correctly:
d=shift(dist(100),50,50)
g=exp(-d^2/400)
c_annotat=['0.1','0.2','0.4','0.8','1.6','3','6','12','25',' 50','98']
lev = max(g)* float(c_annotat)/100.
contour,g,c_annot=c_annotat,lev=lev
The only thing wrong that I can see is that the .98 label doesn't
appear, but all the other contours are labeled properly.
Ed Schmahl
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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| Re: Problem with labeling contour lines in IDL [message #65431 is a reply to message #65430] |
Wed, 04 March 2009 12:30 |
ed.schmahl
Messages: 11
Registered: October 2008
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Junior Member |
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On Mar 4, 7:10 am, David Fanning <n...@dfanning.com> wrote:
> Nusret Sevin writes:
>> I have a problem with labeling contour lines in IDL:
>> ...
>> Is there a way that I can force IDL to put labels on nonlinear parts?
>
> You have almost no control over contour line labeling
> in IDL direct graphics. If you want control, you are
> going to have to switch to object graphics. If I were
> going to do this, I would start with something like
> XContour, which is very old and needs to be updated,
> but which has many of the parts you will need already
> in place. Perhaps you can update it for the rest of us. :-)
>
> http://www.dfanning.com/programs/xcontour.pro
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
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| Re: Problem with labeling contour lines in IDL [message #65548 is a reply to message #65428] |
Tue, 10 March 2009 01:57 |
Nusret Sevinç
Messages: 8
Registered: March 2009
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Junior Member |
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On 4 Mart, 22:46, David Fanning <n...@dfanning.com> wrote:
> ed.schm...@gmail.com writes:
>> Maybe I'm doing something different, but this little script in Direct
>> Graphics seems to produce nonlinear annotation almost correctly:
>
>> d=3Dshift(dist(100),50,50)
>> g=3Dexp(-d^2/400)
>> c_annotat=3D['0.1','0.2','0.4','0.8','1.6','3','6','12','25' ,'50','98']
>> lev =3D max(g)* float(c_annotat)/100.
>> contour,g,c_annot=3Dc_annotat,lev=3Dlev
>
>> The only thing wrong that I can see is that the .98 label doesn't
>> appear, but all the other contours are labeled properly.
>
> I think the word "linear" in Nusret's post was a red herring.
> I like to think that contours need to be "long enough" to
> be interrupted by a break for a contour label. What "long
> enough" means is unclear, but I know for a fact we have no
> control over it. In this case, you would see a contour label
> for the 0.98 contour, if you made your window twice as big.
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")
That is exactly what I mean David. Since I have a deadline for my work
very soon, I am going to label the lines with xyouts. After my work is
done, I will check your program and try to update it.
Thank you both for your interest,
Nusret Sevinç
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