[R] working on a vector with named elements - unname

[William Dunlap]

Typo below, 'latter' -> 'former'.  namedVector[[i]]
drops the names and namedVector[i] does not.

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com 

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of William Dunlap
> Sent: Wednesday, February 15, 2012 8:57 AM
> To: Alexander; r-help at r-project.org
> Subject: Re: [R] working on a vector with named elements - unname
> 
> You could use [[ instead of [, as the XXlatterXX drops
                                          former      
> the names.  E.g., after
>   > v <- c("a"=3,"a"=4,"c"=5,"d"=6)
> change your
>   > c("n"=v["a"]+v["c"],"n1"=v["d"]*3) # "n.a"=8 "n1.d"=18
>    n.a n1.d
>      8   18
> to
>   > c("n"=v[["a"]]+v[["c"]],"n1"=v[["d"]]*3) # "n"=8 "n1"=18
>    n n1
>    8 18
> 
> Bill Dunlap
> Spotfire, TIBCO Software
> wdunlap tibco.com
> 
> > -----Original Message-----
> > From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf Of Alexander
> > Sent: Wednesday, February 15, 2012 1:43 AM
> > To: r-help at r-project.org
> > Subject: [R] working on a vector with named elements - unname
> >
> > Hi, I am working under R2.11.1 Windows.
> > I work with a set of parameters which is save under a vector. I think it is
> > easier to understand, which parameter is called in the vector by naming all
> > vector elements. For example, we have a vector which the parameters a,b,c,d.
> > Is it normal to allow, that there are two elements with the same name? I
> > think for lists, it is also possible. If I want to regroup the elements and
> > work on them, they always keep their old name. Event if I attribute to a new
> > name, the new name and the old name merge (lign3)
> >
> > v<-c("a"=3,"a"=4,"c"=5,"d"=6)
> > v["a"] #output 3
> > c("n"=v["a"]+v["c"],"n1"=v["d"]*3) # "n.a"=8 "n1.d"=18
> >
> > Is there any better solution/datatype to this ?
> >
> > c("n"=unname(v["a"])+unname(v["c"]),"n1"=unname(v["d"])*3) # "n"=8 "n1"=18
> >
> > Thanks a lot
> >
> >
> > --
> > View this message in context: http://r.789695.n4.nabble.com/working-on-a-vector-with-named-elements-
> > unname-tp4389930p4389930.html
> > Sent from the R help mailing list archive at Nabble.com.
> >
> > ______________________________________________
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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.