[R] sending a vector of characters as arguments for a function

[Gabor Grothendieck]

Try this:

C1 <- 1:3
C2 <- 4:6
sapply(ls(pattern = "C"), get)

On 3/8/07, BOISSON, Pascal <Pascal.BOISSON at veolia.com> wrote:
> Dear all,
>
>
>
> It seems to be a recurrent problem to me and I am asking your help to
> get over it once for all ...
>
>
>
> My idea is :
>
>
>
> I have variables C_1, C_2, C_3 ... that corresponds to vectors of size
> n, and I would like to cbind them.
>
>
>
> I get a vector of their names using :  temp<- ls(pat="C")
>
> And I like to find a way to use this vector temp as an argument to
> cbind.
>
>
>
> Unfortunately, my various trials failed, here are some samples of what I
> tried :
>
>
>
>
>
> Attempt :
>
> s0<-ls(pat="C")
>
> s3<-split(s0, f=s0)  #as do.call need a list of arguments
>
> do.call("cbind", s3)  #failed
>
>
>
>
>
> attempt :
>
> s1<-as.character(rbind(ls(pat="C"), ", "))
>
> s2<-paste( s1[1:(length(s1)-1)], collapse="")
>
>
>
>    parse(text=paste(as.character(parse(text=s2)) #I couldn't manage to
> get anywhere with this ...
>
>
>
> It appears that I have a problem with "expressions" management, and I
> couldn't find any clue in ?parse or ?expression
>
>
>
> Thanks for any comment on this
>
> Sincerely,
>
> Pascal Boisson
>
>
>
>
>
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