Warnes, Gregory R wrote:
Hi All,
Since I changed the gregmisc package into a bundle, I almost daily questions
asking how to get the individual packages contained in the bundle.
The standard example arises when someone attempts to install and then use my
'genetics' package which depends on the 'gdata' package contained within the
'gregmisc' bundle. The install succedes, but when the user does
library(genetics) they get the error message:
library(genetics)
Loading required package: gdata
Error: package 'gdata' could not be loaded
The user then attempts to install the package 'gdata' not realizing that it
is part of the (e.g.) gregmisc bundle, and can't find it. For example
install.packages(gdata)
trying URL
`http://cran.r-project.org/bin/windows/contrib/2.0/PACKAGES'
Content type `text/plain; charset=iso-8859-1' length 24149 bytes
opened URL
downloaded 23Kb
Warning message:
No package gdata on CRAN. in: download.packages(pkgs, destdir =
tmpd,
available = available,
Now the user is in trouble and sends me an error message asking how to get
the 'gdata' package.
A couple of minor changes to the package installation/listing tools would
help alleviate this and some related problems.
1) Modify install.packages() so that the by default dependencies=TRUE,
since this knows how to find dependencies within bundles.
(Why is this FALSE by default anyway? In normal circumstances, is
there any
reason to install a package without installing its
dependencies?)
2) Modify install.packages() to check if a requested package is contained in
a bundle, and install the bundle if so.
This is already done, at least in R-2.0.1 if dependencies is set to
TRUE.
3) Modify CRAN.packages() to list packages contained within bundles as well
as independent packages, so that the windows install packages from CRAN
menu item will properly show bundled packages.
You already get the packages in bundles in the Contains column with
CRAN.packages()[,Contains]
Uwe
Comments?
Gregory R. Warnes
Associate Director, Non-Clinical Statistics
Pfizer Global Research and Development
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