[R] directory of current script

[Thomas Lumley]

On Fri, Apr 13, 2012 at 11:37 AM, pdb <philb at philbrierley.com> wrote:
> I am running a series of scripts sequentially and they all need some global
> parameters. These will be included in a file in a known sub directory as the
> scripts themselves.
>
> The scripts need to be run by anyone without ANY editing.
>
> Question is:
>
> Is there a command to return the directory of the current script, so it then
> knows where to find the global parameter file?

There isn't a completely general way to do this, because there might
not *be* a directory

source("http://bioconductor.org/biocLite.R")
source(textConnection("print('Hello, world.')"))
source("")

etc

However,  source() has a chdir=TRUE option that sets the current
working directory to the directory of the file, if it is a file and
has a directory, and then getwd() will return that directory.

    -thomas


-- 
Thomas Lumley
Professor of Biostatistics
University of Auckland