I use make to do things like you describe. Here is an example target
from one of my Makerules files:
$(T:%=compare.R$(REP).T%):compare.%: compare.R estimates.%
@echo making $(notdir $(PWD)) $@ because $? changed ...
@(cd $(subst compare.,,$@) ; \
echo "z <- try( sourc
R-devel has file_test() in utils (earlier versions had a private version
in tools). That has a '-nt' op to do what you need.
file.info() accesses modification dates.
Having said that, I would use 'make' as for example R's own test suites
do.
On Wed, 7 Feb 2007, Lutz Prechelt wrote:
> Dear R-
Dear R-devels,
I am looking for a package (or some other infrastructure) for the
following situation:
I am doing a larger data evaluation.
I have several dozen data files and do not want to keep the persistent
data in the R workspace (for robustness reasons).
I have several dozen R files, some fo
