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Re: IDL 8.2.2 released [message #83761 is a reply to message #83575]

Thu, 21 March 2013 02:38

tom.grydeland
Messages: 51
Registered: September 2012

Member

> Le mercredi 20 mars 2013 10:58:17 UTC+1, Tom Grydeland a écrit :
>> Building up plots incrementally is still painfully slow.

On Wednesday, March 20, 2013 4:07:23 PM UTC, alx wrote:
> You should not call the NG plot function in a loop. The POLYLINE function with using CONNECTIVITY keyword is much better in your case.

Sure. Myself, I used PLOT with NaNs as every third value. That also works.

> the execution time goes from 36.1 sec. on my machine down to 0.031 sec.
> A factor 1000 which has to be explained by Exelis...

This is what I'm getting at. Your workaround, and mine as well, forces all the lines drawn in one command to have the same properties, and makes it impossible to hold on to separate handles for them, should that be of interest. Say you wanted the ability to draw lines in individual colors, or to selectively highlight one of the lines at a later point.

Saying "don't call NG routines in a loop" is useful practical advice, but unsatisfactory. Varying N in my example demonstrates quadratic increase in time with N, so it appears that all existing graphic elements are queried (e.g. for XYZ boundaries) whenever a new element is added. Surely there is an object in the graphics bestiary which could be responsible for remembering and updating the X/Y/Z extrema instead of having to recompute them on every operation? For extra points, identify all other instances where every element in a graphic is being queried.

> alain.

--T

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[Message index]

		IDL 8.2.2 released By: Mark Piper on Tue, 05 February 2013 09:39
		Re: IDL 8.2.2 released By: David Fanning on Wed, 06 February 2013 16:24
		Re: IDL 8.2.2 released By: Mark Piper on Thu, 07 February 2013 08:16
		Re: IDL 8.2.2 released By: Mark Piper on Wed, 06 February 2013 16:09
		Re: IDL 8.2.2 released By: tom.grydeland on Wed, 20 March 2013 02:58
		Re: IDL 8.2.2 released By: Mark Piper on Wed, 06 February 2013 16:00
		Re: IDL 8.2.2 released By: Matt[2] on Thu, 07 February 2013 08:20
		Re: IDL 8.2.2 released By: Mark Piper on Wed, 06 February 2013 15:23
		Re: IDL 8.2.2 released By: Bob[4] on Wed, 06 February 2013 13:23
		Re: IDL 8.2.2 released By: Bob[4] on Thu, 07 February 2013 10:53
		Re: IDL 8.2.2 released By: dain.cilke on Thu, 07 February 2013 14:07
		Re: IDL 8.2.2 released By: Louis Giglio on Wed, 06 February 2013 13:01
		Re: IDL 8.2.2 released By: Andy Sayer on Thu, 07 February 2013 06:22
		Re: IDL 8.2.2 released By: Fabzi on Wed, 06 February 2013 11:18
		Re: IDL 8.2.2 released By: David Fanning on Wed, 06 February 2013 10:24
		Re: IDL 8.2.2 released By: Mark Piper on Wed, 06 February 2013 09:20
		Re: IDL 8.2.2 released By: Mark Piper on Wed, 06 February 2013 09:18
		Re: IDL 8.2.2 released By: David Fanning on Wed, 06 February 2013 06:51
		Re: IDL 8.2.2 released By: Fabzi on Wed, 06 February 2013 06:37
		Re: IDL 8.2.2 released By: lecacheux.alain on Wed, 06 February 2013 04:29
		Re: IDL 8.2.2 released By: Fabzi on Wed, 06 February 2013 01:44
		Re: IDL 8.2.2 released By: wlandsman on Tue, 05 February 2013 23:29
		Re: IDL 8.2.2 released By: David Fanning on Tue, 05 February 2013 15:06
		Re: IDL 8.2.2 released By: wlandsman on Tue, 05 February 2013 14:28
		Re: IDL 8.2.2 released By: timothyja123 on Sat, 09 February 2013 02:44
		Re: IDL 8.2.2 released By: Matt Haffner on Fri, 08 February 2013 13:48
		Re: IDL 8.2.2 released By: Michael Galloy on Wed, 13 February 2013 16:19
		Re: IDL 8.2.2 released By: Mark Piper on Wed, 20 March 2013 14:10
		Re: IDL 8.2.2 released By: Fabzi on Fri, 08 February 2013 09:15
		Re: IDL 8.2.2 released By: Fabzi on Fri, 08 February 2013 09:04
		Re: IDL 8.2.2 released By: timothyja123 on Tue, 12 February 2013 16:43
		Re: IDL 8.2.2 released By: dain.cilke on Fri, 08 February 2013 08:24
		Re: IDL 8.2.2 released By: chris_torrence@NOSPAM on Fri, 08 February 2013 08:14
		Re: IDL 8.2.2 released By: Bob[4] on Thu, 07 February 2013 14:55
		Re: IDL 8.2.2 released By: dain.cilke on Thu, 07 February 2013 14:10
		Re: IDL 8.2.2 released By: Bob[4] on Thu, 07 February 2013 12:14
		Re: IDL 8.2.2 released By: David Fanning on Thu, 07 February 2013 11:15
		Re: IDL 8.2.2 released By: chris_torrence@NOSPAM on Thu, 07 February 2013 09:11
		Re: IDL 8.2.2 released By: Mark Piper on Thu, 07 February 2013 08:55
		Re: IDL 8.2.2 released By: David Fanning on Thu, 07 February 2013 08:21
		Re: IDL 8.2.2 released By: Mark Piper on Thu, 14 February 2013 08:23
		Re: IDL 8.2.2 released By: Michael Galloy on Wed, 13 February 2013 16:16
		Re: IDL 8.2.2 released By: timothyja123 on Wed, 13 February 2013 14:52
		Re: IDL 8.2.2 released By: Fabzi on Wed, 13 February 2013 02:04
		Re: IDL 8.2.2 released By: lecacheux.alain on Wed, 20 March 2013 09:07
		Re: IDL 8.2.2 released By: tom.grydeland on Thu, 21 March 2013 02:38
		Re: IDL 8.2.2 released By: Mark Piper on Thu, 21 March 2013 09:41
		Re: IDL 8.2.2 released By: chris_torrence@NOSPAM on Mon, 15 April 2013 21:08
		Re: IDL 8.2.2 released By: tom.grydeland on Fri, 26 April 2013 03:06
		Re: IDL 8.2.2 released By: chris_torrence@NOSPAM on Fri, 26 April 2013 14:33
		Re: IDL 8.2.2 released By: tushar on Thu, 25 April 2013 23:31

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