CEM with cox proportional hazard models?

[shelleybrown423]

does CEM work with cox proportional hazards models?

For example, I am trying to run this code

est4 <- att(mat, cox_model <- coxph(Surv(survival.DV, fail.yesno) ~ treat.binary, data = filtered.miss))

and I get this error:

Error in att(mat, cox_model <- coxph(Surv(survival.DV, fail.yesno) ~ treat.binary, : argument "data" is missing, with no default