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Re: Overplot behalfs strange [message #73262]

Thu, 04 November 2010 06:04

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

sirvival writes:

> Strange thing is I used /noerase on a different window in my code and
> it still does what I want (display is from
> http://www.astro.uu.se/~piskunov/RESEARCH/REDUCE/display.pro).
> Even if it is in a differnt pro that I run prior.

Yes, any time you do a Plot or Contour command,
a data coordinate system is established and stored
in system variables. It doesn't matter what window
you issue the command in. But, if you rely on
commands outside your program to do things for you,
you will be shocked and awed, sooner rather than
later, at how quickly things can turn bad for you.
And it is usually during the big demo of your new
software to your boss. :-)

> With wrong you mean nlevels?

When you use the NLEVELS keyword in a contour plot,
you are only guaranteed the number of levels won't
exceed N. How many *less* than N you get is a matter
of which phase the moon is in and whether you have
attended religious services in the past 10 days.

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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[Message index]

		Re: Overplot behalfs strange By: David Fanning on Thu, 04 November 2010 06:04
		Re: Overplot behalfs strange By: sirvival on Thu, 04 November 2010 04:02
		Re: Overplot behalfs strange By: David Fanning on Wed, 03 November 2010 09:51
		Re: Overplot behalfs strange By: sirvival on Thu, 04 November 2010 06:38

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