Hi,
How is it possible to specify all predictors in ridge function?
suppose that I have 100 predictors and I want to apply ridge to all 100
variables. instead of putting the name of all variables separated by
"," (see 2nd code line below), which notation should I use so that
ridge would be applied to all variables?
something similar to . that is used in coxph
coxph (Surv(Survtime, Survstat) ~., data = ...
usage of ridge function
ridge(..., theta, df=nvar/2, eps=0.1, scale=TRUE)
fit1 <- coxph(Surv(futime, fustat) ~ rx + ridge(age, ecog.ps, theta=1),
ovarian)
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Luggage? GPS? Comic books?
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