[R] Running source() on a file in another directory

[Gabor Grothendieck]

Suppose p is a vector of paths, e.g., p <- c("~/dir1", "~/dir2/dir3")
Then the following will return the full pathname of the first found
location:

   Find(file.exists, file.path(p, "prog.R"))

so you can source that.

On Wed, Oct 1, 2008 at 6:09 PM, Gang Chen <gangchen6 at gmail.com> wrote:
> Suppose I have a file prog.R stored in a directory under ~/dirname,
> and ~/dirname is set in a shell script file (e.g. .cshrc) as one of
> the accessible paths on terminal. On a different directory I could run
> prog.R interactively by executing
>
> source("~/dirname/prog.R")
>
> It seems that source() does not search for all the paths set in the
> shell script. So, is there a better and more elegant way to do this,
> for example without explicitly typing the directory?
>
> TIA,
> Gang
>
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