Jessica:

On Fri, Jul 13, 2012 at 1:35 AM, Jessica Streicher <j.streicher@micromata.de
> wrote:

> two things:
>
> - R always counts from 1, not from 0
> - listmembers are accessed by using [[ ]] , not [ ]
>

FALSE! -- or at least not clearly stated:

 > x <- list(a=letters[1:3],b=1:4)
> x[[2]]
[1] 1 2 3 4
> x[2]
$b
[1] 1 2 3 4

Note that the first is a vector, the second component of x; while the
second is a list whose only component is the second component of x.

-- Bert

>
> try
>
> t1[t==ll[[1]], "v"] <- 99
>
> greetings Jessi
>
>
> On 11.07.2012, at 15:47, Charles Stangor wrote:
>
> > I can't seem to determine how to get the name of a list member to
> > substitute:
> >
> > ll <- list("a1" = "a","a2" = "b")
> >
> > t1[t==ll[0], "v"] <- 99
> >
> > why doesn't this substitute to:
> >
> > t1[t=="a", "v"] <- 99
> >
> > Thank you!
> >
> >
> >
> >
> > --
> > Charles Stangor
> > Professor
> >
> >       [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > 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.
>



-- 

Bert Gunter
Genentech Nonclinical Biostatistics

Internal Contact Info:
Phone: 467-7374
Website:
http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm

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