Silvano wrote:
Hi,
I used subset command, like this:
grupoP = subset(dados, grupos=='P', select=c(mortos, vivos, doses,
percevejos, p))
and the variables in select option are numeric.
They may *look* numeric, but are they really? You don't give us
enough information to determine that. Either give us a sample
of your data with the dput command, or the output of str(grupoP).
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