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 - 05:09:40 EST


Message-ID: <Pine.GSO.4.05.9907272003470.10800-100000@auk.stats>

On Tue, 27 Jul 1999, Paul Gilbert wrote:

> Brian
>
> I haven't got far, but here are some initial problems:
>
> > start(1:10)
> S: [1] 1 1
> ts: 1
>
> > end(1:10)
> S: [1] 10 1
> ts: 10

What's wrong with that? S looks silly to me: you only need the second
component for seasonal series, and 1:10 is not seasonal.

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.

> window.ts should handle NULL for default start and end values. If it is going
> to print a warning then it needs warn=F to suppress the warning. Below is a copy
> of my window.ts, but it would require a few minor changes to work without my
> tframe library.

I have not changed window.ts. I'll take a look.

-- 
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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