On Sat, 14 Jun 2008, Андрей Парамонов 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
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