Your message subject says it all. The function is "cv.lm()". Also
check the syntax for data.frame()
On 8-Mar-11, at 8:47 AM, agent dunham wrote:
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?
u...@host.com
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