Several different ways. You can look in the Intro to R to learn more:
> my.list <- list(a=matrix(1:9,3), b=1:4, c="this is a string", d=list(1,2,3))
> my.list
$a
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
$b
[1] 1 2 3 4
$c
[1] "this is a string"
$d
$d[[1]]
[1] 1
$d[[2]]
[1] 2
$d[[3]]
[1] 3
> my.list$a
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
> my.list$d
[[1]]
[1] 1
[[2]]
[1] 2
[[3]]
[1] 3
> my.list$d[[2]]
[1] 2
> my.list[[4]][[2]] # same as above
[1] 2
> my.list[[1]] # same as my.list$a
[,1] [,2] [,3]
[1,] 1 4 7
[2,] 2 5 8
[3,] 3 6 9
>
On Dec 9, 2007 1:36 PM, Mag. Ferri Leberl <[EMAIL PROTECTED]> wrote:
> Thank you, this seems promissing. How can I address then a certain
> element e.g. to add the second and the third component?
> Faithfully,
> Mag. Ferri Leberl
>
>
>
> Am Sonntag, den 09.12.2007, 07:11 -0800 schrieb jim holtman:
>
> > You program contains:
> >
> > de.dd<-c("Dresden",51,2,13,44)
> >
> > and since you are mixing characters with numerics and putting them
> > into a single vector, the data is coerced to a common data type, which
> > in this case is numeric. What are you trying to do? Do you want to
> > use a list?
> >
> > > de.dd
> > [1] "Dresden" "51" "2" "13" "44"
> > > de.dd<-list("Dresden",51,2,13,44)
> > > de.dd
> > [[1]]
> > [1] "Dresden"
> >
> > [[2]]
> > [1] 51
> >
> > [[3]]
> > [1] 2
> >
> > [[4]]
> > [1] 13
> >
> > [[5]]
> > [1] 44
> >
> > A list will maintain the mode of each element.
> >
> > On Dec 9, 2007 6:14 AM, Mag. Ferri Leberl <[EMAIL PROTECTED]> wrote:
> > > Dear Everybody,
> > > Enclosed are the tiny beginning of a program and its output.
> > > As a pity, if I load the image <load("kanal.RData")> the elements of
> > > <de.dd> are non numerical; <de.dd[2]+de.dd[3]> returns <Fehler in
> > > de.dd[2] + de.dd[3] : nicht-numerisches Argument für binären Operator>.
> > > How can I keep the numbers numerical?
> > > Thank you in advance.
> > > hopefully,
> > > Mag. Ferri Leberl
> > >
> > > ______________________________________________
> > > R-help@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.
> > >
> > >
> >
> >
> >
>
> ______________________________________________
> R-help@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.
>
--
Jim Holtman
Cincinnati, OH
+1 513 646 9390
What is the problem you are trying to solve?
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
