Offhand, I'd guess that the "median" is inbetween two factor levels in
one case and not in the other.
Hm, maybe. A problem, that would not occur, if I used the median on the numeric data of this factor.
However, both cases should give an error, especially for unordered factors, but it is not well-defined
That's what I expected.
for ordered factors either. If you want to interpret your factor as a numeric scale, use as.numeric first.
Yes, I already understood this :-) (At last we received your book or rather three of your books and the MASS-book).
Thanks for your answer.
Regards,
Christoph -- Christoph Bier, Dipl.Oecotroph., Email: [EMAIL PROTECTED] Universitaet Kassel, FG Oekologische Lebensmittelqualitaet und Ernaehrungskultur \\ Postfach 12 52 \\ 37202 Witzenhausen Tel.: +49 (0) 55 42 / 98 -17 21, Fax: -17 13
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