No, I didn't actually get bitten by this. I used 'aggregate.formula' only recently. I saw this when trying to know how 'aggregate.formula' worked, especially in accepting dot (.) in left-hand side of formula. Thanks for the fix.
--- On Mon, 3/9/12, peter dalgaard <pda...@gmail.com> wrote: > From: peter dalgaard <pda...@gmail.com> > Subject: Re: [Rd] Typo (?) in 'aggregate.formula' > To: "Suharto Anggono Suharto Anggono" <suharto_angg...@yahoo.com> > Cc: R-devel@r-project.org > Date: Monday, 3 September, 2012, 4:43 PM > This (and more) was fixed in r-devel > back in May. Did you actually get bitten by this? (The code > has been there for years, so it hasn't been slated for > R-patched.) > > -pd > > On Sep 3, 2012, at 11:06 , Suharto Anggono Suharto Anggono > wrote: > > > In the code for 'aggregate.formula', there is > > if (as.character(formula[[2L]] == ".")) > > I believe that it is meant to be > > if (as.character(formula[[2L]]) == ".") > > > > However, > > if (as.character(formula[[2L]] == ".")) > > gives the expected result. > > Tracing: > > - formula[[2L]] == "." > > is equivalent to > > as.character(formula[[2L]]) == "." > > From the help page for '==' (Comparison), "Language > objects such as symbols and calls are deparsed to character > strings before comparison." > > - By applying 'as.character', the TRUE/FALSE result of > > formula[[2L]] == "." > > is converted to character, becomes "TRUE"/"FALSE". > > - Then, for 'if', it is implicitly converted back to > logical. > > > > > >> sessionInfo() > > R version 2.14.2 (2012-02-29) > > Platform: i386-pc-mingw32/i386 (32-bit) > > > > locale: > > [1] LC_COLLATE=English_United States.1252 > > [2] LC_CTYPE=English_United > States.1252 > > [3] LC_MONETARY=English_United States.1252 > > [4] LC_NUMERIC=C > > > [5] LC_TIME=English_United States.1252 > > > > attached base packages: > > [1] stats graphics > grDevices utils datasets > methods base > > > > > > I see that, in R 2.15.1, the code for > 'aggregate.formula' is still the same. > > > > ______________________________________________ > > R-devel@r-project.org > mailing list > > https://stat.ethz.ch/mailman/listinfo/r-devel > > -- > Peter Dalgaard, Professor > Center for Statistics, Copenhagen Business School > Solbjerg Plads 3, 2000 Frederiksberg, Denmark > Phone: (+45)38153501 > Email: pd....@cbs.dk > Priv: pda...@gmail.com > > ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
