Berwin A Turlach wrote: > G'day Gregor, > > >>>>>>"GG" == Gregor Gorjanc <[EMAIL PROTECTED]> writes: > > > GG> I am writing some functions and I repeatedly acces internal > GG> factor codes. I figured out that internal codes are 1:n where > GG> 1 represents 1st level, 2 2nd level etc. This is not > GG> documented [...] > The help page for factor states in the 'Details' section: > > The encoding of the vector happens as follows. First all the > values in 'exclude' are removed from 'levels'. If 'x[i]' equals > 'levels[j]', then the 'i'-th element of the result is 'j'. If no > match is found for 'x[i]' in 'levels', then the 'i'-th element of > the result is set to 'NA'. > > Note in particular the part on "then the 'i'-th element of the result > is 'j'". This pretty much documents that the internal codes are 1:n > and 'NA', as documented in the following sentence.
Thanks for this pointer to documentation. -- Lep pozdrav / With regards, Gregor Gorjanc ---------------------------------------------------------------------- University of Ljubljana PhD student Biotechnical Faculty Zootechnical Department URI: http://www.bfro.uni-lj.si/MR/ggorjan Groblje 3 mail: gregor.gorjanc <at> bfro.uni-lj.si SI-1230 Domzale tel: +386 (0)1 72 17 861 Slovenia, Europe fax: +386 (0)1 72 17 888 ---------------------------------------------------------------------- "One must learn by doing the thing; for though you think you know it, you have no certainty until you try." Sophocles ~ 450 B.C. ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel