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System Variable Behavior Changed in IDL 6.0 [message #38488]

Wed, 10 March 2004 21:32

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Folks,

I wanted to display some images today in a !P.MULTI situation.
It used to be that my TVIMAGE program could handle !P.MULTI
events automatically. (Don't try this at home with TV.) But
this appeared to be broken in IDL 6.0. No !P.MULTI behavior
at all!

I traced the problem to a change in how system variables
behave in IDL 6.0. Here is a sequence of plots in IDL 5.6.
Notice now the !X and !Y window fields update the plot
location as you go.

IDL> Print, !Version
{ x86 Win32 Windows Microsoft Windows 5.6 Oct 26 2002 32 64}
IDL> !P.Multi=[0,2,3]
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.0823579 0.703035 0.475299 0.981823
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.582358 0.703035 0.975299 0.981823
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.0823579 0.369702 0.475299 0.648490
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.582358 0.369702 0.975299 0.648490
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.0823579 0.0363686 0.475299 0.315157
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.582358 0.0363686 0.975299 0.315157

Here is the same sequence of commands in IDL 6.0. No updating of
the system variables. :-(

IDL> print, !Version
{ x86 Win32 Windows Microsoft Windows 6.0 Jun 27 2003 32 64}
IDL> !P.Multi=[0,2,3]
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.150000 0.125000 0.950000 0.950000
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.150000 0.125000 0.950000 0.950000
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.150000 0.125000 0.950000 0.950000
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.150000 0.125000 0.950000 0.950000
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.150000 0.125000 0.950000 0.950000
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.150000 0.125000 0.950000 0.950000
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.150000 0.125000 0.950000 0.950000
IDL> plot, findgen(11)
IDL> print, !X.Window[0], !Y.Window[0], !X.Window[1], !Y.Window[1]
0.150000 0.125000 0.950000 0.950000

Is this a Windows thing? Collecting data for a call to RSI. :-)

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		System Variable Behavior Changed in IDL 6.0 By: David Fanning on Wed, 10 March 2004 21:32
		Re: System Variable Behavior Changed in IDL 6.0 By: Craig Markwardt on Fri, 12 March 2004 14:26
		Re: System Variable Behavior Changed in IDL 6.0 By: David Fanning on Fri, 12 March 2004 09:58
		Re: System Variable Behavior Changed in IDL 6.0 By: Stein Vidar Hagfors H[2] on Fri, 12 March 2004 09:17
		Re: System Variable Behavior Changed in IDL 6.0 By: westrick85 on Fri, 12 March 2004 05:18
		Re: System Variable Behavior Changed in IDL 6.0 By: Pepijn Kenter on Fri, 12 March 2004 00:51
		Re: System Variable Behavior Changed in IDL 6.0 By: mperrin+news on Thu, 11 March 2004 21:48
		Re: System Variable Behavior Changed in IDL 6.0 By: MKatz843 on Thu, 11 March 2004 16:33
		Re: System Variable Behavior Changed in IDL 6.0 By: David Fanning on Thu, 11 March 2004 15:10
		Re: System Variable Behavior Changed in IDL 6.0 By: Michael Wallace on Thu, 11 March 2004 14:33
		Re: System Variable Behavior Changed in IDL 6.0 By: mperrin+news on Thu, 11 March 2004 13:52
		Re: System Variable Behavior Changed in IDL 6.0 By: David Fanning on Thu, 11 March 2004 13:46
		Re: System Variable Behavior Changed in IDL 6.0 By: Dick Jackson on Thu, 11 March 2004 13:01

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