This hasn't crashed R. It is almost certainly stack overflow due to excessive recursion (which is what happens on Linux, and in R-patched on Windows). (Note to people tempted to raise the evaluation limit in R: please check against the stack size. We've raised the latter to 10Mb on Windows to compensate.) I get
> summary(surv) Error: evaluation nested too deeply: infinite recursion / options(expressions=)? The issue is that surv is a matrix, and summary.matrix calls summary.data.frame which calls summary.matrix on the matrix column .... And this happens because there is an as.data.frame method for class Surv. You probably got a useful error message in 2.1.0: I did. The current code come from r33884 | maechler | 2005-04-11 11:37:04 +0100 (Mon, 11 Apr 2005) | 1 line summary(data.frame(I(<matrix>))) which is clearly not enough. When Martin gets back perhaps he can remind us why unclass() was not good enough here. I think we need > summary.matrix function (object, ...) summary.data.frame(data.frame(unclass(object)), ...) since there is no other way to guarantee that data.frame splits the matrix up into columns. But a summary.Surv method would be a good idea. On Tue, 11 Oct 2005 [EMAIL PROTECTED] wrote: > Full_Name: Victor Moreno > Version: 2.2.0 > OS: windows > Submission from: (NULL) (213.151.99.160) > > > summary of an object class Surv (package survival) hangs and closes R 2.2.0 > > I would like to have Surv objects in a data frame to build models easier: > > t<-rexp(100) > s<-rbinom(100,1,.3) > surv<-Surv(t,s) > x1<-rnorm(100,10,2) > x2<-rnorm(100,10,2) > dat<-data.frame(surv,x1,x2) > coxph(surv~.,data=dat) > > so far no problems, but R crashes if I write > > summary(dat) > > I checked that the problem is in > summary(surv) > > Tested on previous versions of R (1.9.0, 2.1.0) in a friend's computer) > gives no results, but doesn't crash R -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
