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Re: sorting array column/rowwise [message #31326 is a reply to message #31324]

Wed, 03 July 2002 15:27

Paul Sorenson
Messages: 48
Registered: May 2002

Member

Have you looked at the SORT routine? The following example sorts by the
first column of a.

IDL> a = randomu(seed, 4, 4)
IDL> print, a[*, sort(a[0, *])]
0.303753 0.933435 0.723623 0.636985
0.535081 0.804346 0.313356 0.620587
0.574060 0.790996 0.821293 0.671731
0.799868 0.0666149 0.123060 0.281230

There's also a routine called BSORT at
http://idlastro.gsfc.nasa.gov/ftp/pro/misc/bsort.pro . It is like the IDL
SORT function but subscript order is maintained when values are equal.

-Paul Sorenson

"Marc Schellens" <m_schellens@hotmail.com> wrote in message
news:3D2295BC.5030207@hotmail.com...
> Is there an elegant (ie. without loops) way to sort
> the columns or rows of an array?
> I need the sorted indices.
> thanks,
> marc
>

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[Message index]

		Re: sorting array column/rowwise By: R.Bauer on Thu, 04 July 2002 07:47
		Re: sorting array column/rowwise By: David Fanning on Thu, 04 July 2002 06:42
		Re: sorting array column/rowwise By: Jaco van Gorkom on Thu, 04 July 2002 02:26
		Re: sorting array column/rowwise By: marc schellens[1] on Thu, 04 July 2002 00:37
		Re: sorting array column/rowwise By: Paul Sorenson on Wed, 03 July 2002 15:27

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