Re: [R] Cox ridge regression

Thank you Terry, that answered all questions. As a suggestion, help page for ridge() might indicate that the ridge term simultaneously introduces predictors and penalizes them. Ljubomir From: Terry Therneau To: Ljubomir Buturovic Cc: r-help@r-project.org Subject: Re: Cox ridge regression

[R] Cox ridge regression

e standard Cox regression function, and doesn't introduce any new predictors. What to make of the ridge(age) and ridge(ph.ecog) rows in the output? Question 3. What is the origin and significance of the warning in the previous example: Warning message: In sqrt((diag(x$var2))[kk]) : NaNs produced

[R] Which Linux OS on Athlon amd64, to comfortably run R?

--enable-R-shlib; make; make pdf # make install; make install-pdf Notice that `make install' has to be run as root. I am using Feisty Fawn (Ubuntu 7.04), although I doubt that makes a difference. Hope this helps, Ljubomir 8rino-Luca Pantani writes: > Dear R-users. > I eventually bo