[R] How to set type of censored data in coxph regression

[Terry Therneau]

> 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