comp.lang.idl-pvwave archive: archive » Swap even/odd elements in array

Home » Public Forums » archive » Swap even/odd elements in array

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

Re: Swap even/odd elements in array [message #44594 is a reply to message #44507]

Wed, 22 June 2005 01:52

Xavier Llobet
Messages: 7
Registered: April 2005

Junior Member

In article <1119428174.330105.170110@o13g2000cwo.googlegroups.com>,
photosalex@freenetname.co.uk wrote:

> Hi All,
> sorry if the question is trivial:
> how could I swap even and odd elements of a 1-D 16-bit INT array
> without using loops? That is, if the source array is
>
> [a0,a1,a2,a3,..]
>
> I want it to be
>
> [a1,a0,a3,a2,..]
>
> Thanks!

n = (size(a))(1)
ind=2*indgen(n)
b=reform(transpose(reform([a(ind+1),a(ind)],n/2,2)),n)

Bear my IDL 3.6.1 notation...

--
_xavier
--
Only one "o" in my e-mail address
--
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing on usenet and in e-mail?

Report message to a moderator

[Message index]

		Swap even/odd elements in array By: photosalex on Wed, 22 June 2005 01:16
		Re: Swap even/odd elements in array By: JD Smith on Tue, 28 June 2005 12:00
		Re: Swap even/odd elements in array By: Craig Markwardt on Thu, 23 June 2005 00:52
		Re: Swap even/odd elements in array By: Peter Mason on Wed, 22 June 2005 14:43
		Re: Swap even/odd elements in array By: K. Bowman on Wed, 22 June 2005 06:22
		Re: Swap even/odd elements in array By: David Fanning on Wed, 22 June 2005 07:06
		Re: Swap even/odd elements in array By: Xavier Llobet on Wed, 22 June 2005 01:52

Previous Topic:	Histogram shift
Next Topic:	background transparency in tvscl?

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 01:11:43 PDT 2025

Total time taken to generate the page: 0.16169 seconds