not only is googling R so terribly difficult, log4r has also been taken for Ruby!
I am looking for the standard (if any) logging package for R. and some sample usage?
I also don't see it in http://cran.r-project.org/web/packages/
(late edit: it is now at its place on CRAN and there's a R-Forge page for it.)
I'm not aware of any, so I was about to release a wrapper for log4j in the next few days (I've been testing it for a while now). I'll let you know when it's available.
I found that RSeek is useful for searching for things related to R. It uses Google on the back-end. Unfortunately, I didn't really find much related to logging. But just for future reference...
The in-built (package base) functions are "warning", "message", "stop". These functions support multiple languages. If you want to log to a file, maybe you could use these functions together with "sink".
Searching with RSeek brought up the package futile with a logger functionality.
I just submitted a 'logging' package to CRAN. it is based on some parts of an older version of the 'futile' package (by Brian Lee Yung Rowe).
you find the logging package:
it mimics the standard python logging package, but please be careful if you decide to use it. I also attempted to document it by example, the package home page on R-Forge points to a couple of possible usage sessions.
any feedback will be read with interest!