[Rd] Referencing 'inst' directory in installed package

[Marc Schwartz]

On Aug 16, 2011, at 10:17 PM, Jonathan Malmaud wrote:

> Hi,
> My R package has files in the 'inst' directory that it needs to reference. How can the R scripts in my package find out the full path to the 'inst' directory after the package is installed, given that different users may have installed the package to different libraries? 
> 
> Thanks,
> Jon Malmaud


See ?path.package and ?file.path

Example:

> require(WriteXLS)
Loading required package: WriteXLS

# I am on OSX
> path.package("WriteXLS")
[1] "/Library/Frameworks/R.framework/Versions/2.13/Resources/library/WriteXLS"

I have Perl scripts in my package, which are in the /inst/Perl folder in the package source, so:

> file.path(path.package("WriteXLS"), "Perl/WriteXLS.pl")
[1] "/Library/Frameworks/R.framework/Versions/2.13/Resources/library/WriteXLS/Perl/WriteXLS.pl"


HTH,

Marc Schwartz