I am getting an error that I don't understand, and wonder if anyone could explain what's going on. I call a function defined thus:
clogit.rds<-function(formula,data,extra.data,response.prob, na.action=getOption("na.action"),subset=NULL, control=coxph.control()){ method="exact" # only option for now mf<-match.call() mf[[1]]<-as.name("model.frame") mf$method<-mf$control<-NULL mfn<-mf mfn$na.action<-"I" mfn$subset<-NULL nrows<-NROW(eval(mfn,parent.frame())) etc. At the eval on the last line, I get Error in model.frame(formula, rownames, variables, varnames, extras, extranames, : variable lengths differ This is puzzling for two reasons. First, I don't understand where the arguments given in the error message are coming from. They are not in my function definition or call, and they do not seem to be the arguments to model.frame either. Second, I don't know why it's not working! This is modified from clogit in survival, and that works fine. I've added two arguments, extra.data (which is just a column of the data) and response.prob. The latter has different dimensions (response.prob = c(1, 1), in fact), but nothing in the description of model.frame suggests that should be a problem. model.frame itself is a wrapper on a primitive, so I can't really debug into it. Background: Running R 1.7.1-1 on Debian Gnu/Linux. In case it matters, the code I'm running was produced by hacking the survival package, running R CMD check, and then loading the package from the test directory that created: library("survival", lib.loc="/home/ross/src/survival.Rcheck") The clogit command seems to run fine. One of the variables in the data.frame is name proband, which I notice gets highlighted by ESS. ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help