[R] naming vectors/ matrices in R

Erich Neuwirth erich.neuwirth at univie.ac.at
Tue Mar 31 19:16:05 CEST 2009

This is probably what you want

for (i in (1:dim(mydf)[2])) assign(letters[i],mydf[,i])

I would not, however, recommend it.
It really does not produce very readable code.

emj83 wrote:
> I would like to create a series of vectors in a loop and name them with
> letters.
> I know the command letters gives me the 26 letters of the alphabet.
> For example, I have a dataframe, called A, with 6 columns.
>> B<-length(A)
>> C<-letters(1:B)
> [1] "a" "b" "c" "d" "e" "f"
> I would like to extract the first letter "a", and put the first column of
> dataframe A in a vector called "a"
>> C<-e[1] 
> [1] "a"
> but when I type
>> e[1]=A[,1]
> Warning message:
> In e[1] =A[, 1] :
>   number of items to replace is not a multiple of replacement length
> It thinks I am trying to replace the first element of e with the first
> column of A.
> is there any other way in which I can achieve this?
> Thanks in advance

Erich Neuwirth, University of Vienna
Faculty of Computer Science
Computer Supported Didactics Working Group
Visit our SunSITE at http://sunsite.univie.ac.at
Phone: +43-1-4277-39464 Fax: +43-1-4277-39459

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