Displaying 1 result from an estimated 1 matches for "bucket575".
2012 Nov 17
4
survfit & number of variables != number of variable names
This works ok:
> cox = coxph(surv ~ bucket*(today + accor + both) + activity, data = data)
> fit = survfit(cox, newdata=data[1:100,])
but using strata leads to problems:
> cox.s = coxph(surv ~ bucket*(today + accor + both) + strata(activity),
> data = data)
> fit.s = survfit(cox.s, newdata=data[1:100,])
Error in model.frame.default(data = data[1:100, ], formula = ~bucket + :