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...ze, as well as of feeding guild, nest placement, nest type and foragig strata as factors. I hope to model with these variables the preference of primary forests (#successes) by certain bird species. My code therefore looks like: y<-cbind(n_forest,n_trials-n_forest) model<-glm(y~range+body+nstrata+ntype+forage+feed,family=quasibinomial(link=logit),data=dat) however plausible the approach may look, overdispersion is prevalent (dispersion estimated at 6.5). I read up on this and learned that in case of multiple factors, not all levels may yield good results with logistic regression (Crawle...

...: warning: ?oobpair? may be used uninitialized in this function rf.c:98: warning: ?strata_size? may be used uninitialized in this function rf.c:98: warning: ?strata_idx? may be used uninitialized in this function rf.c:97: warning: ?nind? may be used uninitialized in this function rf.c:89: warning: ?nstrata? may be used uninitialized in this function rf.c:92: warning: ?nclts? may be used uninitialized in this function gfortran -fpic -fmessage-length=0 -O2 -Wall -D_FORTIFY_SOURCE=2 -fstack-protector -funwind-tables -fasynchronous-unwind-tables -c rfsub.f -o rfsub.o gcc -std=gnu99 -I/usr/lib64/R/incl...

...his mailing list, I found mention of this error back in 2008. Does this mean that clogit function is no longer being developed and there is another, more suitable function? I tried to replace clogit witch cph, but in this case, the error was: Error in names (Strata) <- paste ( "S", 1: nstrata, sep = ""): 'names' attribute [2] must be the same length as the vector [0] Can I use R Project to calculate the conditional probabilities, or am I doomed to use Stata? WBR Dmitrij [[alternative HTML version deleted]]