R-alpha: factors ...
Thomas Lumley
thomas@biostat.washington.edu
Wed, 21 May 1997 08:01:11 -0700 (PDT)
On Wed, 21 May 1997, Kurt Hornik wrote:
> Perhaps someone can enlighten me here:
> R> x <- factor(LETTERS[1:3])
> [1] "factor"
>
> S-PLUS has
> > x <- factor(LETTERS[1:3])
> > mode(unclass(x))
> [1] "numeric"
It's a feature. R has a primitive factor type, S-PLUS doesn't and so loses
factorness with unclass(). You can use as.numeric() to coerce to numeric
in either system.
Thomas Lumley
------------------------------------------------------+------
Biostatistics : "Never attribute to malice what :
Uni of Washington : can be adequately explained by :
Box 357232 : incompetence" - Hanlon's Razor :
Seattle WA 98195-7232 : :
------------------------------------------------------------
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-