From ripley at stats.ox.ac.uk  Mon Nov  3 09:51:28 2008
From: ripley at stats.ox.ac.uk (Prof Brian Ripley)
Date: Mon, 3 Nov 2008 08:51:28 +0000 (GMT)
Subject: [Rd] sort returns a wrong index (PR#13242)
In-Reply-To: <20081103071507.5E6BF282EF48@mail.pubhealth.ku.dk>
References: <20081103071507.5E6BF282EF48@mail.pubhealth.ku.dk>
Message-ID: <alpine.LFD.2.00.0811030839340.3149@gannet.stats.ox.ac.uk>

The default for na.last in sort() is NA (unlike sort.list):

> sort.list(xd, na.last=NA)
[1] 4 2 3 1 5 6 7

so the answer is correct (and the same as given by 2.7.2).

On Mon, 3 Nov 2008, bert.tijhuis at wavin.com wrote:

> Full_Name: Bert Tijhuis
> Version: 2.8.0
> OS: MS-Windows
> Submission from: (NULL) (217.140.7.52)
>
>
>> xd
> [1]  0.5 -1.0  0.2   NA -3.0  1.0  2.0   NA  2.0
>
>
>> sort(xd, index=T)$ix
> [1] 4 2 3 1 5 6 7
>
>
> And in my believe it should be
> 5 2 3 1 6 7 8 4 9

The FAQ asks you to report only things you 'know for certain', not 
beliefs.

> This was function well in R 2.7.2

Indeed it did and gave the same answer as 2.8.0!

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595



[Rd] sort returns a wrong index (PR#13242)
Prof Brian Ripley