From ripley@stats.ox.ac.uk  Wed May 24 14:07:12 2000
From: ripley@stats.ox.ac.uk (Prof Brian D Ripley)
Date: Wed, 24 May 2000 14:07:12 +0100 (BST)
Subject: [Rd] hypot(x,y) instead of pythag(a,b) ?!
In-Reply-To: <14635.53594.717309.718373@gargle.gargle.HOWL>
Message-ID: <Pine.GSO.4.05.10005241404200.8042-100000@auk.stats>

On Wed, 24 May 2000, Martin Maechler wrote:

> >>>>> "BDR" == Prof Brian D Ripley <ripley@stats.ox.ac.uk> writes:
> 
>     BDR> This does all seem to me to be trying to solve a non-existent problem.
> 
> Not according to our own (R core) standards,
> which I thought to be roughly like 
> 
>  GOLD>> We require ANSI C 
>  GOLD>> and everything else must be tested for by configure
>  GOLD>>   (and worked around either be saying (warning) "is not available",
>  GOLD>>    or by providing own code).
>   
> I think hypot() definitely falls in that class, 
> particularly since it's not even POSIX [as of Lewine(1991)]

Still, it is a problem that has not (AFAIK) been reported by anyone, and
there is quite a list of outstanding bugs at R-bugs ....

-- 
Brian D. Ripley,                  ripley@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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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[Rd] hypot(x,y) instead of pythag(a,b) ?!
Prof Brian D Ripley