[R] cv.lm syntax error

[Uwe Ligges]

On 04.03.2011 10:11, agent dunham wrote:
> Dear all,
>
> I've tried a multiple regression, and now I want to try a cross-validation.
>
> I obtain this error (it must be sth related to df) that I don't understand,
> any help would be appreciated.
>
> cv.lm(df= dat, lm2.52f, m=3)
>
> Error en `[.data.frame`(df, , ynam) : undefined columns selected
>
> lm2.52f is my lm object,

If this is the cv.lm from the DAAG package (unstated), then please read 
its help page and find that you need to specify a formula as the second 
argument rather than an already fitted lm object.

Uwe Ligges



 > dat is a dataframe where the variables involved in
> .lm are
>
> I tried CVlm also but the same error
>
> Thanks, user at host.com
>
>
>
>
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