[R] crash when using hazard.ratio.plot from rms package

Dear all, I always encounter a crash when running hazard.ratio.plot from rms package with my predictor as a factor. It works fine when the predictor is a continous score. Anyone encounters this too? Is this a bug or something? Thanks, Lilian [[alternat

[R] (no subject)

Hi all, I have a question about survplot in Design package. There is an option to print the number of subjects at risk at the start of each time interval. But I do not know how the time interval is decided, i.e. I do not know the correspoding time to the number at risk printed. How can I get the

[R] coxph

Hello, when using coxph function from survival package, what do you do if you encounter such problem like: Warning message: In fitter(X, Y, strats, offset, init, control, weights = weights, : Loglik converged before variable 3,4 ; beta may be infinite. Thanks!

Re: [R] reading dates in Excel into R

n govern the format used in R using the > > appropriate R functions. I doubt it would be useful to have dates read > > from Excel depend on the format set for displaying those dates in Excel. > > > > HTH > >,,, > > > Peter Alspach > > > >>

[R] reading dates in Excel into R

I am reading dates in Excel2007 into R. Here are the functions I used: library(RODBC) channel<-odbcConnectExcel2007("myfile.xlsx") tmp<-sqlFetch(channel,"1",as.is=T) The dates in myfile.xlsx are all in this format: mm/dd/. But when I read it to R, some columns look like "-mm-dd 00:00: