comp.lang.idl-pvwave archive: archive » Re: Array indexing: what is IDL doing?

Home » Public Forums » archive » Re: Array indexing: what is IDL doing?

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

Re: Array indexing: what is IDL doing? [message #60711 is a reply to message #60710]

Mon, 09 June 2008 05:56

Conor
Messages: 138
Registered: February 2007

Senior Member

On Jun 7, 9:12 am, Jeremy Bailin <astroco...@gmail.com> wrote:
>> So I want to pull out a small subsection from within a larger idl
>> array. I want to do something like this:
>
>> bigarr = findgen(500,100000)
>> bigx = [indgen(50)+100,indgen(25)+200]
>> bigy = indgen(10000)+50000
>
>> res = bigarr[bigx,bigy]
>
> In the particular case above, I would expect that this would be most
> efficient:
>
> res = [bigarr[100:149,50000:59999], bigarr[200:224,50000:59999]]
>
> Of course, that's only going to work when you know a priori that
> everything will be in a relatively small number of chunks.
>
> -Jeremy.

Interesting, thanks!

Report message to a moderator

[Message index]

		Re: Array indexing: what is IDL doing? By: Conor on Tue, 10 June 2008 07:16
		Re: Array indexing: what is IDL doing? By: Jean H. on Mon, 09 June 2008 10:12
		Re: Array indexing: what is IDL doing? By: Heinz Stege on Mon, 09 June 2008 08:34
		Re: Array indexing: what is IDL doing? By: Conor on Mon, 09 June 2008 06:02
		Re: Array indexing: what is IDL doing? By: Conor on Mon, 09 June 2008 05:56
		Re: Array indexing: what is IDL doing? By: Jeremy Bailin on Sat, 07 June 2008 06:12
		Re: Array indexing: what is IDL doing? By: Jean H. on Fri, 06 June 2008 14:15

Previous Topic:	how get value from combobox
Next Topic:	Workbench problem following update

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 00:51:22 PDT 2025

Total time taken to generate the page: 1.03882 seconds