def testARdegenerate(self):
X = W((40,10))
X[:,0] = X[:,1] + X[:,2]
Y = W((40,))
model = ARModel(design=X, rho=0.9)
results = model.fit(Y)
self.assertEquals(results.df_resid, 31)
def testAR(self):
X = W((40,10))
Y = W((40,))
model = ARModel(design=X, rho=0.4)
results = model.fit(Y)
self.assertEquals(results.df_resid, 30)
