On Tue, 10 Aug 2004, Ross Ihaka wrote: > Rob Hyndman wrote: > > When part of a time series is extracted, the time series component is > > lost. e.g., > > x <- ts(1:10) > > x[1:4] > > > > It would be nice if there was a subsetting function [.ts to avoid this > > problem. However, it is beyond my R-coding ability to produce such a > > thing. Is someone willing to do it?
There is a [.ts, in src/library/stats/R/ts.R, and it is documented (?"[.ts"). > Have you had a look at "window"? The problem with "[" > its that it can produce non-contiguous sets of values. Yes. If you look in the sources for [.ts you will see, commented, the code that was once there to handle cases where the index was evenly spaced. But it was removed long ago in favour of window(). I tried to consult the logs, but it seems that in the shift from CVS to SVN recently I can't get at them. I think the rationale was that x[ind] should always produce an object of the same class. -- Brian D. Ripley, [EMAIL PROTECTED] 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 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
