Re: Preliminary version of ts package

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Subject: Re: Preliminary version of ts package
From: Prof Brian D Ripley (ripley@stats.ox.ac.uk)
Date: Wed 28 Jul 1999 - 07:56:25 EST


Message-ID: <Pine.GSO.4.05.9907272252270.11135-100000@auk.stats>

On Tue, 27 Jul 1999, Paul Gilbert wrote:

> Brian
>
> >In general, I am not trying to clone S, most notably as S-PLUS uses class
> >rts not ts, so very little code exists that uses S's class ts. Surely the
> >point of R is not _better_? There are lots of detail improvements,
> >with more to come.
>
> Yes, hopefully there will be lots of improvements. But I think everyone has
> agreed that we want S compatability for the default behaviour, so if "ts" is

Not in my time with R: can you give me the reference to that agreement,
please. (If it is a generic comment, there are many, many exceptions.)

> not going to be the default, then the default needs to be defined. Then, for
> example, we cannot have
>
> start.default <- function (x) start.ts(ts(x))
>
> as it is now.

Why not? S-PLUS thinks 1:10 has start=c(1,1), end=c(10,1), and would any
sane person think that? (I might buy c(1,0)....)

-- 
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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