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Re: ROI on map [message #50192]

Tue, 19 September 2006 04:56

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Axel writes:

> Thanks, my widget programming is a bit rusty, so I was looking at the
> DEFROI function and was looking for something equivalent for a
> non-image "direct" graphic.

Well, widgets usually use "direct" graphics. At least mine
do.

I suppose you could do something like this in a regular
IDL window, but the code will be so convoluted and ugly
that it hardly seems worth it to me. Your widget programming
skills don't have to be very spectacular to make something
like this work, though. Something very, very basic is
probably enough. :-)

> I think I can work from your example though, thanks! When you say
> restore coordinate space you mean that I reset the system variables
> !X,!Y and !MAp to the saved values by
> simply setting:
> IDL> saved_map= !MAP
> IDL> e.g. plot,x,y
> IDL> !MAP=saved_map

That's what I mean. (Although, usually in the reversed
order of this.)

Plot, x, y
bangX = !X
bangY = !Y

Then, later in your program when you need to know this
data coordinate space is set up properly:

!X = bangx
!y = bangy

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: ROI on map By: David Fanning on Tue, 19 September 2006 04:56
		Re: ROI on map By: catwithhat on Mon, 18 September 2006 22:29
		Re: ROI on map By: David Fanning on Mon, 18 September 2006 10:55

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