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Re: sorting array column/rowwise [message #31322 is a reply to message #31321]

Thu, 04 July 2002 06:42

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Marc Schellens (m_schellens@hotmail.com) writes:

> but I wanted to sort each column individually.
> Any guesses?

Here is how I would sort a column of an array.
But I think I would use the BSORT routine,
rather than the SORT routine if I was putting
it into a piece of code that mattered to me.

IDL> a=randomu(-3L, 3, 10)
IDL> print, a
0.897916 0.558249 0.766930
0.589101 0.0603181 0.973112
0.0378892 0.218058 0.142394
0.984703 0.894904 0.947651
0.804079 0.160385 0.208246
0.818130 0.103716 0.741117
0.0134482 0.0960160 0.692969
0.0230946 0.181693 0.0777949
0.269231 0.286594 0.730963
0.727624 0.272199 0.481930
IDL> s1 = sort(a[1,*])
IDL> a[1,*] = (a[1,*])[s1]
IDL> print, a
0.897916 0.0603181 0.766930
0.589101 0.0960160 0.973112
0.0378892 0.103716 0.142394
0.984703 0.160385 0.947651
0.804079 0.181693 0.208246
0.818130 0.218058 0.741117
0.0134482 0.272199 0.692969
0.0230946 0.286594 0.0777949
0.269231 0.558249 0.730963
0.727624 0.894904 0.481930

I expect that if I spent five more minutes on this
I could probably write a generalized program
that would sort on any column. :-)

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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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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