RE: Is a ts of length one a ts? (PR#245)

About this list Date view Thread view Subject view Author view Other groups

Subject: RE: Is a ts of length one a ts? (PR#245)
From: Martyn Plummer (plummer@iarc.fr)
Date: Wed 11 Aug 1999 - 17:23:38 EST


Message-ID: <XFMail.990811092338.plummer@iarc.fr>

On 10-Aug-99 ripley@stats.ox.ac.uk wrote:
> Is there any good reason why a time series of length one is not
> allowed by [.ts (you can certainly create one with ts)?

It certainly has a start and an end value, but what's the
frequency? If you want the tsp attribute of a time series
to be well defined, then maybe you should disallow series
of length 1.

"[.ts" certainly needs fixing. There has been some discussion
about this and I think the consensus was that "[.ts" should
not attempt to return a time series when taking row subsets
(computationally expensive, and quite difficult to cover
all cases, see PR#216, PR#217). The window() function is more
appropriate for taking subseries IMHO.

Martyn
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._


About this list Date view Thread view Subject view Author view Other groups

This archive was generated by hypermail 2b25 : Tue 04 Jan 2000 - 14:16:07 EST