[R] Change class factor to numeric

[Paulo Justiniano Ribeiro Jr]

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 (Laboratório de Estatística e Geoinformação)
Departamento de Estatística
Universidade Federal do Paraná
Caixa Postal 19.081
CEP 81.531-990
Curitiba, PR  -  Brasil
Tel: (+55) 41 361 3573
Fax: (+55) 41 361 3141
e-mail: paulojus at est.ufpr.br
http://www.est.ufpr.br/~paulojus