[R] "Re: Change class factor to numeric"

[Arantzazu Blanco Bernardeau]

sorry I had a mistake sending my question without a subject. I do resend again. Please excuse me.
> Hello
> I have a data array with soil variables (caperf), in which the variable "clay" is factor (as I see entering str(caperf)) . I need to do a regression model, so I need to have arcilla (=clay) as a numeric variable.  For that I have entered
>
> as.numeric(as.character(arcilla))
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> and even entering
> 'as.numeric(levels(arcilla))[arcilla]'the variable is resting as factor, and the linear model is not valid (for my purposes).
> The decimal commas have been converted to decimal points, so I have no idea of what to do.
> Thanks a lot
>
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> Arantzazu Blanco Bernardeau
> Dpto de Química Agrícola, Geología y Edafología
> Universidad de Murcia-Campus de Espinardo
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