[R] cv.lm syntax error

[agent dunham]

Thanks for your answer, but I type the following: 

> dfmod.1 <- data.frame(dat$v1,dat$v2,dat$v3,dat$v4, dat$v5,factor)

> CVlm(df= dfmod.1, form.lm = formula(dat$v1 ~ dat$v2+dat$v3+ dat$v4+
> dat$v5+ factor), m=3, seed=29, plotit=TRUE, printit =TRUE) 

Error en `[.data.frame`(df, , ynam) : undefined columns selected

What does it mean?

user at host.com

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