Merge 4d55647 into 98e3923

CamDavidsonPilon · Apr 27, 2016 · bd39343 · bd39343
2 parents 98e3923 + 4d55647
commit bd39343
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lifelines/fitters/coxph_fitter.py b/lifelines/fitters/coxph_fitter.py
@@ -282,7 +282,7 @@ def fit(self, df, duration_col, event_col=None,
         """
         df = df.copy()
         # Sort on time
-        df.sort(duration_col, inplace=True)
+        df.sort_values(by=duration_col, inplace=True)
 
         # remove strata coefs
         self.strata = strata