CamDavidsonPilon/lifelines — pull request #120 by CamDavidsonPilon (2014-12-22 15:22:43+00:00)
Title: Optional event_col in AAF and CPH fitters

@spacecowboy, this PR adds the option for the `event_col` parameter (default None). If left as `None`, then we assume all non-censored (similar to the kmf fitter).

Also, `duration_col` is now a mandatory argument.