[R] opening files in directory

[Gabor Grothendieck]

On 9/4/06, Mike Nielsen <mr.blacksheep at gmail.com> wrote:
> R won't do variable interpolation inside quotation marks as perl does.

Just as an aside, gsubfn in package gsubfn will do perl-style
(well, sort of) string interpolation:

> library(gsubfn)
> i <- 1
> gsubfn(x = "data_files/file$i")
[1] "data_files/file1"

cati and cati0 in the same package provide for such interpolation
within cat.