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Re: Interesting property of sort [message #54083 is a reply to message #53994]

Wed, 16 May 2007 09:52

cmancone
Messages: 30
Registered: May 2007

Member

Interesting. That explains a lot. I had checked the results of my
sort to see whether or not it maintained order for equal value points,
and I didn't see any loss of order. When it was suggested to use
bsort to maintain the order, I just assumed that sort happened to get
it right for the things I checked. I guess I really just didn't have
to worry, since I'm on linux.

On May 16, 11:55 am, "wlands...@jhu.edu" <wlands...@gmail.com> wrote:
>> Humm. Well, I haven't looked at it in a long time.
>> Looks to me like BSORT uses the IDL SORT command to
>> get the initial cut. (And I have NO idea what algorithm
>> is used for that. It is the standard OS SORT routine,
>> I'm sure.)
>
> That's right, the IDL SORT uses the sort algorithm of the OS, so the
> way it treats equal values depends on the OS. From previous
> discussions here, I believe that most Linux systems preserve order for
> equal values, but Windows and Mac OSX do not. I've been tempted to
> update bsort.pro to just call SORT if the user is on the "right" OS,
> but that sort ( pun intended) of coding is difficult to maintain. --
> Wayne

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[Message index]

		Interesting property of sort By: cmancone on Wed, 16 May 2007 05:41
		Re: Interesting property of sort By: cmancone on Thu, 17 May 2007 10:55
		Re: Interesting property of sort By: David Fanning on Wed, 16 May 2007 10:01
		Re: Interesting property of sort By: cmancone on Wed, 16 May 2007 09:52
		Re: Interesting property of sort By: wlandsman@jhu.edu on Wed, 16 May 2007 08:55
		Re: Interesting property of sort By: David Fanning on Wed, 16 May 2007 07:37
		Re: Interesting property of sort By: cmancone on Wed, 16 May 2007 07:23
		Re: Interesting property of sort By: David Fanning on Wed, 16 May 2007 06:50

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