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Re: cutting/grouping [message #85777 is a reply to message #85774]

Thu, 05 September 2013 21:15

Seb
Messages: 15
Registered: January 2006

Junior Member

On Thu, 05 Sep 2013 23:39:47 +0200,
Heinz Stege <public.215.967@arcor.de> wrote:

> Hi Seb, I have absolutely no knowledge about R. The following may help
> you, or may not. Look for the value_locate function in the IDL
> documentation. It can reproduce the results of your R calculation:

IDL> a=indgen(10)+1 b=indgen(6)*2 pos=value_locate(b,a) pos-=b[pos] eq a
IDL> print,b[pos]
> 0 0 2 2 4 4 6 6 8 8
IDL> print,'('+strtrim(b[pos],2)+','+strtrim(b[pos+1],2)+']'
> (0,2] (0,2] (2,4] (2,4] (4,6] (4,6] (6,8] (6,8] (8,10] (8,10]
IDL> u=uniq(pos)
IDL> print,'('+strtrim(b[pos[u]],2)+','+strtrim(b[pos[u]+1],2)+'] '
> (0,2] (2,4] (4,6] (6,8] (8,10]

Thanks, this is a great tool. I see though that it's limited to cases
where 'a' increases monotonically.

Cheers,
--
Seb

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[Message index]

		cutting/grouping By: Seb on Thu, 05 September 2013 08:41
		Re: cutting/grouping By: Heinz Stege on Thu, 05 September 2013 14:39
		Re: cutting/grouping By: Seb on Thu, 05 September 2013 21:15
		Re: cutting/grouping By: Heinz Stege on Fri, 06 September 2013 05:48

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