Re: [R] align() function missing in R ?

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Fri, 29 Jun 2007 08:52:17 +0100 (BST)

On Fri, 29 Jun 2007, Martin Maechler wrote:

> Hi Markus,
>
> You can't assume that a typical R users knows much about S+.
> "R has been beyond S+ for a long time"
> {{ :-) :-) please Insightful staff, don't start to jump at me !}}
> Even I, as a very long time S and Splus user (of the past:
> 1987--~1997), have never, I think, used align().
>
> Can you give *reproducible examples* of what align() does for you?
> Then, kind R users will typically show you simple ways to achieve the
> same.
>
> Also: R is Free Software (i.e. open source and more), so
> we'd be happy to accept offers of an align() function that
> behaved compatibly (``or better'') than the S-plus one.
> Note however that you'd typically not be allowed to copy the
> S-plus implementation.

align() relates to the S4 time series classes introduced in S-PLUS 5 (or so, after 1997). There are no comparable classes in base R, but there are in some of the addon packages - fCalendar has already been mentioned and there are others (see the CRAN Econometric task view).

window, ts.union and ts.intersect have done all the alignment on regular time series (class "ts") I have ever needed.

>
> Martin
>
>
>>>>>> "ML" == Markus Loecher <markus_at_insightfromdata.com>
>>>>>> on Thu, 28 Jun 2007 11:10:51 -0400 writes:
>
> ML> Dear list members, I switched from Splus to R a few
> ML> years ago and so far found no functionality missing.
> ML> However, I am struggling to find the equivalent align()
> ML> function for time series. I did find some reduced
> ML> functionality such as alignDailySeries in
> ML> package:fCalendar but the full capability of aligning
> ML> two timeseries seems to be missing. Could this be true
> ML> ? I am sure there must be a need for this useful
> ML> function. Any help would be greatly appreciated.
>
> ML> Thanks !
>
> ML> Markus
>
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>

-- 
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

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Received on Fri 29 Jun 2007 - 07:59:44 GMT

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