error in make.names docs (PR#6912)
Peter Dalgaard <p.dalgaard@biostat.ku.dk> writes:
Prof Brian Ripley <ripley@stats.ox.ac.uk> writes:
Example output in comment is now corrected in R-patched. What has the rest to do with a bug report?
He's hoping (with some reason) that the change of behaviour was the bug. I seem to recall some internal discussion of the effect, but not whether it just got forgotten or whether you might as well just do gsub(...something...) on the names of the dataframe.
Apparently, the latter was the case. It is quite easy to fix the names after reading, and adding a compatibility feature would be kludgy, and not relieving you of changing the old code anyway. I have updated the docs (for 1.9.1) with some more specific instructions about what to do: diff -r1.9.4.1 make.names.Rd 31a32,36
\note{
Prior to version 1.9.0, underscores were not valid in variable names,
and code that relies on them being converted to dots will no longer
work. The simplest workaround is to use \code{gsub("_", ".",
names)}.
}
diff -r1.50 read.table.Rd 189a190,196
Prior to version 1.9.0, underscores were not valid in variable names,
and code that relies on them being converted to dots will no longer
work. The simplest workaround is to use
\code{names(d) <- gsub("_", ".", names(d))},
or, avoiding the (small) risk of creating duplicate names,
\code{names(d) <- make.names(gsub("_", ".", names(d)),
unique=TRUE)}.
O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk) FAX: (+45) 35327907