Re: [R] cbind'ing multivariate ts objects

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Sun, 15 Jun 2008 08:07:33 +0100 (BST)

On Sat, 14 Jun 2008, wrote:

> I use R 2.7.0 on GNU/Linux. I have noticed a problem in cbind method
> for multivariate time series (ts) objects. Consider the following
> example:
>
>> t <- ts(data.frame(a = 10:20, b = 20:30, c = 30:40, d = 40:50))
>> t1 <- t[, c('a', 'b')]
>> t2 <- t[, c('c', 'd')]
>>
>> colnames(t1)

> [1] "a" "b"
>> colnames(t2)
> [1] "c" "d"
>> colnames(cbind(t1, t2))
> [1] "t1.a" "t1.b" "t2.c" "t2.d"
>>
>
> Although it seems to be the documented behavior, I think it would be
> more consistent if the latter returned c("a", "b", "c", "d")

Consistent with what? This is how all such combinations of matrices in R work, and avoids duplicate names.

> instead. Is there a nice way to achieve this? Thanks!

Use colnames() to change the names -- it is just a matrix.

tt <- cbind(t1, t2)
colnames(tt) <- c("a", "b", "c", "d")

>
> Andrey Paramonov
>
> ______________________________________________
> R-help_at_r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
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


______________________________________________ R-help_at_r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.

Received on Sun 15 Jun 2008 - 07:14:45 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Sun 15 Jun 2008 - 08:30:43 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive