[R] cbind in for loops

[Joshua Wiley]

Hi,

Assuming that you have read the files into R,
and that their names (in R) are held in some object
(e.g., 'file2'), then this works

do.call(what = cbind, args = mget(x = file2, envir = .GlobalEnv)

Here is a reproducible example:

x1 <- data.frame(x = 1:10)
x2 <- data.frame(y = 1:10)
file.names <- c("x1", "x2")
do.call(cbind, mget(file.names, envir=.GlobalEnv))

Best regards,

Josh


On Sun, Jul 11, 2010 at 9:08 PM, jd6688 <jdsignature at gmail.com> wrote:
>
> I have 30 files in the current directories, i would like to perform the
> cbind(fil1,file2,file3,file4....file30)
>
> how could i do this in a for loop:
>
> such as:
>     file2 <- list.files(pattern=".out3$")
>       for (j in file2) {
>         cbind(j).......how to implement cbind here
>      }
>
>
> Thanks.
>
>
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-- 
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/