Hi I'm trying to use the fold function as described here: http://cran.r-project.org/doc/contrib/Fox-Companion/appendix-cox-regression.pdf Page9
It does say that you can use this when you have more than one time varying covariate: in the description of the argument cov it says: "cov: A vector giving the column numbers of the time-dependent covariate in data, or a list of vectors if there is more than one time-dependent covariate." But I'm struggling with the syntax to list these vectors (I have 3 time varying covariates). I've tried "cov=list(10:20,21:31,32:42)" But this just gives me an error message. Does anyone know how I can list my vectors in the context? Thanks Helen ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
