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
