[R] R Package Building Question
thomas at biostat.washington.edu
Thu Mar 2 01:43:29 CET 2000
On Wed, 1 Mar 2000, Brett Presnell wrote:
> 1. If this file is named R/sta4504 (with no extension), then when I
> build the package (under Solaris), create a zip file and install the
> package on a Windows PC, it works fine. However, under Solaris,
> R INSTALL sta4504 hangs and does not complete the installation of the
> 2. If this file is named R/sta4504.R, then the package installs and
> works fine on the Solaris machine, but the same package is not
> recognized as even existing by R under Windows.
> I notice that most (all?) of the contributed packages leave off the
> extension, in spite of the advice to the contrary (at least to my
> reading) in Section 1.1.3 of "Writing R Extensions", and they all work
> on both platforms. I don't remember ever seeing this come up on the
> list, so what am I missing?
What you're missing is that Unix packages are source code and Windows
packages are compiled. It's less obvious when there isn't any C or Fortran
code. This is because typical Windows installations lack not only
compilers for C and Fortran but also the tools to process help pages.
In source form the package/R directory contains one or more files with
extensions .R (or .r, .q or various other possibilities), the package/src
directory has C or Fortran source code, package/man has .Rd files.
In compiled form package/R has a single file whose name is the name of the
package, the /src subdirectory is replaced by a /libs subdirectory with a
shared library, the /man subdirectory is replaced by one or more
subdirectories with various compiled help files.
So, sta4504.tgz should be a source package, with extensions, sta4504.zip
should be a compiled package, with no extensions. There would be other
differences if you had help pages for the functions.
Assistant Professor, Biostatistics
University of Washington, Seattle
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