vcov method for 'coxph' objects
"Vito Muggeo" <vito.muggeo at giustizia.it> writes:
Dear all, The help file for the generic function vcov states "Classes with methods for this function include: 'lm', 'glm', 'nls', 'lme', 'gls', 'coxph' and 'survreg' (the last two in package 'survival')." Since, I am not able to use vcov.coxph(), I am wondering whether I am missing something (as I suspect..)
It's a bug in the NAMESPACE file for survival:
survival:::vcov.coxph(o)
x x 1.660006 or
vcov.coxph <- survival:::vcov.coxph vcov(o)
x x 1.660006 So the only thing you're missing is example(coxph) in your example. Without that, test1 is not found.
o<- coxph( Surv(time, status) ~ x + strata(sex), test1) #example from
?coxph
vcov(o) #of course I could use o$var
Error in vcov(o) : no applicable method for "vcov"
It has been reported before, and I think it is fixed in the current patch version.
O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907