Dear R users, I tried to analysis the hazard function of some data by coxph function in survival package. The type of the data include "left-censored", "right-censored", "both right-censored and left-censored" (btw, does this has a technical term?), and "complete" ones.
The coxph function is only defined for right-censored data. That is why you get an error when you include left and interval censored observations. Terry Therneau