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Re: Can I do this without using loops? [message #6407 is a reply to message #6323]

Sat, 15 June 1996 00:00

David Ritscher
Messages: 30
Registered: August 1995

Member

Snipped out from Stein Vidar's post:

> Have you tried these with the /SAMPLE keyword to REBIN as well?
> And also: rebin(findgen(rows,1),rows,columns,/sample) for
> TEST8_rows?

No, I only tested the 18 programs listed.

I just did a quick check on rebin using the /sample keyword. Here
are the
comparison of routines test8 and test8_rows, relative execution
times
(i.e., with compared to without the /sample keyword):

Ratios of execution times of rebin(/sample) / rebin():

problem with 3000, 3000 rows and columns:

IDL PV-Wave
test8 1.22997 0.676364
test8_rows 0.999363 0.956496

problem with 1000, 30000 rows and columns:

IDL PV-Wave
test8 1.06719 0.936516

> I should of course try out every piece of this on the local
> machines, but that'll wait till later.

I'll be interested to hear what you get for timings on all of these.
Thinks could perform very differently under different conditions.

--

David Ritscher
Raum 47.2.401
Zentralinstitut fuer Biomedizinische Technik
Albert-Einstein-Allee 47
Universitaet Ulm
D-89069 ULM
Germany

Tel: ++49 (731) 502 5313
Fax: ++49 (731) 502 5315
internet: david.ritscher@zibmt.uni-ulm.de

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[Message index]

		Can I do this without using loops? By: Peter Clinch on Wed, 05 June 1996 00:00
		Re: Can I do this without using loops? By: steinhh on Sun, 16 June 1996 00:00
		Re: Can I do this without using loops? By: bowman on Sat, 15 June 1996 00:00
		Re: Can I do this without using loops? By: David Ritscher on Sat, 15 June 1996 00:00
		Re: Can I do this without using loops? By: steinhh on Fri, 14 June 1996 00:00
		Re: Can I do this without using loops? By: David Ritscher on Fri, 14 June 1996 00:00
		Re: Can I do this without using loops? By: steinhh on Tue, 11 June 1996 00:00
		Re: Can I do this without using loops? By: Trygve Sparr on Tue, 11 June 1996 00:00
		Re: Can I do this without using loops? By: David Ritscher on Mon, 10 June 1996 00:00

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