Re: [R] Change class factor to numeric

From: Paulo Justiniano Ribeiro Jr <paulojus_at_est.ufpr.br>
Date: Fri 06 May 2005 - 21:51:52 EST

as.numeric()

On Fri, 6 May 2005, Smit, R. (Robin) (IenT) wrote:

> I am attempting to develop a multiple regression model using selected
> model variables that should all be treated as numeric (mostly real)
> values.
> However, R considers one specific variable "mass" automatically to be of
> class "factor", probably because "mass" consists of integer values that
> are repeated.
> I now want to force R to treat "mass" as a numeric variable in the
> regression but am not sure how to do this.
>
> > class(mass) <- "numeric"
>

> does not help me.
>
> Could anyone advise me on this?

>
> Kind regards,
> Robin Smit
>
>
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Paulo Justiniano Ribeiro Jr
LEG (Laboratório de Estatística e Geoinformação) Departamento de Estatística
Universidade Federal do Paraná
Caixa Postal 19.081
CEP 81.531-990
Curitiba, PR - Brasil
Tel: (+55) 41 361 3573
Fax: (+55) 41 361 3141
e-mail: paulojus@est.ufpr.br
http://www.est.ufpr.br/~paulojus



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri May 06 21:53:40 2005

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