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Re: Further adventures in POLAR_CONTOUR [message #79409 is a reply to message #79408]

Wed, 29 February 2012 09:15

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

John Coxon writes:

> That's *exactly* what my code was doing before, and I don't think it can
> do what I need it to do.
>
> Imagine you plot the co-ordinate lines using PLOT or OPLOT and then use
> the above levels/colours. POLAR_CONTOUR plots white as the
> background/zero level, which obscures the lines completely.
>
> Doing the reverse (plotting the POLAR_CONTOUR and then using OPLOT)
> means that the lines are drawn over the fills, which means there are
> grey lines going through each region of blue/red, which looks very messy
> and inelegant.
>
> As such, your suggested method doesn't allow for the plotting of the
> co-ordinate lines (as far as I can tell), and so I've had to resort to
> the method I posted here - but I am still curious as to why my original
> method didn't work and I had to introduce the mentioned fix.

Oh, I see. Yes, what you "need" it to do, and what it "can"
do, are often two completely different things. :-)

But, I think you have done a pretty good job of coaxing
it into working for you. As to *why* it works like that,
I really don't know. Quite a lot of what the Contour
command does is a complete and utter mystery to me. :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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[Message index]

		Re: Further adventures in POLAR_CONTOUR By: Brian Wolven on Wed, 29 February 2012 11:35
		Re: Further adventures in POLAR_CONTOUR By: John Coxon on Wed, 29 February 2012 10:26
		Re: Further adventures in POLAR_CONTOUR By: David Fanning on Wed, 29 February 2012 09:15
		Re: Further adventures in POLAR_CONTOUR By: John Coxon on Wed, 29 February 2012 08:47
		Re: Further adventures in POLAR_CONTOUR By: David Fanning on Wed, 29 February 2012 06:35
		Re: Further adventures in POLAR_CONTOUR By: David Fanning on Wed, 29 February 2012 06:13

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