comp.lang.idl-pvwave archive: archive » vectorising versus loops

Home » Public Forums » archive » vectorising versus loops

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: vectorising versus loops [message #38207 is a reply to message #38146]

Tue, 24 February 2004 02:13

Norbert Hahn
Messages: 46
Registered: May 2003

Member

Craig Markwardt <craigmnet@REMOVEcow.physics.wisc.edu> wrote:

> ;; Make a list of indices
> ii = lindgen(n_elements(x))
>
> ;; Select on X and the index variable
> wh = where(x GE 0 AND ii LT 200)

While this is an example of using the index variable,
this statement by itself can be shortened to

wh = where(x[0:199] ge 0)

Norbert

Report message to a moderator

[Message index]

		vectorising versus loops By: nasalmon on Sun, 22 February 2004 10:16
		Re: vectorising versus loops By: Norbert Hahn on Tue, 24 February 2004 02:13
		Re: vectorising versus loops By: Craig Markwardt on Mon, 23 February 2004 16:04
		Re: vectorising versus loops By: Craig Markwardt on Sun, 07 March 2004 09:24
		Re: vectorising versus loops By: nasalmon on Fri, 26 March 2004 11:34
		Re: vectorising versus loops By: stimmins on Mon, 12 April 2004 13:14
		Re: vectorising versus loops By: David Fanning on Fri, 26 March 2004 11:47

Previous Topic:	Re: resizing image
Next Topic:	IDL jobs anyone?

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sat Oct 11 10:10:13 PDT 2025

Total time taken to generate the page: 0.88474 seconds