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Re: Would you consider this a bug? [message #13065 is a reply to message #12982]

Thu, 01 October 1998 00:00

Kevin Ivory
Messages: 71
Registered: January 1997

Member

Leaving the bug topic - switching to algorithms

David Kastrup wrote:
> Unfortunately, translating something like
>
> a[[5,2,3,0,4,1]] = a
> into the equivalent
> a = a[[3,5,1,2,4,0]]
> is not easy to do in the general case.

Actually it is: you need a second call to sort. See example below.

> some data that needed to be processed in sorted order, the results
> needed to be rearranged in original order.
>
> Something like
> s = sort(a)
> a = a[s]
> process(a)
; a[s] = a ; I still think this a dangerous thing to do.
r = sort(s)
a = a[r]

Best regards
Kevin
--
Kevin Ivory Tel: +49 5556 979 434
Max-Planck-Institut fuer Aeronomie Fax: +49 5556 979 240
Max-Planck-Str. 2 mailto:Kevin.Ivory@linmpi.mpg.de
D-37191 Katlenburg-Lindau, GERMANY http://www.gwdg.de/~kivory2/

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[Message index]

		Would you consider this a bug? By: David Kastrup on Wed, 30 September 1998 00:00
		Re: Would you consider this a bug? By: David Kastrup on Mon, 05 October 1998 00:00
		Re: Would you consider this a bug? By: muswick on Sat, 03 October 1998 00:00
		Re: Would you consider this a bug? By: Martin Schultz on Fri, 02 October 1998 00:00
		Re: Would you consider this a bug? By: David Kastrup on Thu, 01 October 1998 00:00
		Re: Would you consider this a bug? By: korpela on Thu, 01 October 1998 00:00
		Re: Would you consider this a bug? By: Kevin Ivory on Thu, 01 October 1998 00:00
		Re: Would you consider this a bug? By: David Kastrup on Thu, 01 October 1998 00:00
		Re: Would you consider this a bug? By: Kevin Ivory on Thu, 01 October 1998 00:00

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