[R] multiple time series

[Gabor Grothendieck]

There is no $.ts defined in R; however, you can define your own if you wish.

"$.ts" <- function(x, i) x[,as.character(substitute(i))]
z$foo # using z from below



Banachewicz KP <konradb <at> fluit.cs.vu.nl> writes:

: 
: thanks Dirk, I missed the obvious z[,i] option (shame on me ;-(
: however, when I tried to use z$foo I get a NULL, despite the fact that
: this particular column is not empty. any idea why ?
: 
: 					rg,
: 
: 					Konrad
: 
: On Sun, 26 Sep 2004, Dirk Eddelbuettel wrote:
: > It works the usual way:>
: > > z <- ts(matrix(rnorm(300), 100, 3), start=c(1961, 1), frequency=12)
: > > colnames(z) <- c("foo","bar","boo")
: > > summary(z[,"boo"])
: >     Min.  1st Qu.   Median     Mean  3rd Qu.     Max.
: > -1.92700 -0.79140 -0.08982 -0.10660  0.54350  2.32600
: > >
: >
: > You could also use z$foo, or z[,1] -- i.e. it works just like the data 
frames.