YOu need to update the survival package: from its NEWS file Changes in version 2.36-14 A supposedly cosmetic change to coxph in the last release caused formulas with a "." on the right hand side to fail. Fix this and add a case with "." to the test suite.
-thomas On Thu, Jul 26, 2012 at 3:26 PM, Peter Langfelder <peter.langfel...@gmail.com> wrote: > Hi all, > > I cant' wrap my head around an error from the coxph function (package > survival). Here's an example: > > library(survival) > n = 100; > set.seed(1); > > time = rexp(n); > event = sample(c(0,1), n, replace = TRUE) > covar = data.frame(z = rnorm(n)); > > model = coxph(Surv(time, event)~ . , data = covar) > > R gives the following error: > >> model = coxph(Surv(time, event)~ . , data = covar) > Error in terms.formula(formula, specials = special) : > '.' in formula and no 'data' argument > > I read through the help file for coxph but nothing jumps out... what > am I doing wrong? > >> sessionInfo() > R version 2.15.0 Patched (2012-04-01 r58897) > Platform: i686-pc-linux-gnu (32-bit) > > locale: > [1] LC_CTYPE=en_US.utf8 LC_NUMERIC=C > [3] LC_TIME=en_US.utf8 LC_COLLATE=en_US.utf8 > [5] LC_MONETARY=en_US.utf8 LC_MESSAGES=en_US.utf8 > [7] LC_PAPER=C LC_NAME=C > [9] LC_ADDRESS=C LC_TELEPHONE=C > [11] LC_MEASUREMENT=en_US.utf8 LC_IDENTIFICATION=C > > attached base packages: > [1] splines stats graphics grDevices utils datasets methods > [8] base > > other attached packages: > [1] survival_2.36-13 > > loaded via a namespace (and not attached): > [1] tools_2.15.0 > > Thanks in advance for all replies! > > Peter > > ______________________________________________ > 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. -- Thomas Lumley Professor of Biostatistics University of Auckland ______________________________________________ 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.