Hello: I would like to run a Cox proportional hazards regression on crayfish dislodgement at different water velocities by crayfish size class and substrate (rock) type. Additionally, there is a covariate variable, rock movement that may be influencing crayfish dislodgment. So...
I have crayfish size class (CFSZCL) and substrate type (SUBSZ) as fixed factors influencing the dislodgment of crayfish at different water velocities (SLIPVEL). Thus, I am currently using the call: coxph(Surv(SLIPVEL, FREEDOM) ~ CFSZCL + SUBSZ + CFSZCL:SUBSZ, data = data.table) However, I would like to add rock movement (BEDLOAD) as a random co-variate, which is not possible with the coxph() function. Is it possible to do so with coxme() in the kinship package? If so, what is the proper syntax? Thanks for any help. Justin Montemarano ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
