bugfix: 'last_iteration' not initialized
@@ -223,6 +223,7 @@ class AalenAdditiveFitter(RegressionFitter):
variance_hazards_ = np.zeros((n_deaths, d))
v = np.zeros(d)
start = time.time()
+ last_iteration = 0
W = np.sqrt(weights)
X = W[:, None] * X
