Circa 80 CRAN and core-R packages have duplicate export entries in their
NAMESPACE files. E.g.,
bit 1.1.9 : c("as.bit", "as.bitwhich",
"as.which", "physical", "virtual")
forecast 4.1 : "forecast.lm"
graphics 2.15.3 : "barplot"
mcmc 0.9.1 : "morph"
RCurl 1.95.3 : "curlOptions"
utils 2.15.3 : "RweaveLatexOptions"
Would it be helpful for 'check' to alert package writers to this?
I made the list using f():
f <- function ()
{
for(pkg in installed.packages()[,"Package"]) {
try( {
exports <- parseNamespaceFile(pkg,
R.home("library"))$exports
if (any(dup <- duplicated(exports))) {
cat(pkg, format(packageVersion(pkg)), ":",
deparse(exports[dup]), "\n")
}
}, silent = TRUE)
}
}
I suppose it should also check for duplicates in S3method component, etc.
Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com
