[R] subset factor?

[Erik Iverson]

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).