-0.029952 , -0.0229632 , -0.01837056, -0.01515571, -0.01279816,
-0.01100641, -0.0096056 , -0.00848495, -0.00757118, -0.00681406,
-0.00617808, -0.0056375 , -0.00517324, -0.00477087, -0.00441934,
-0.00410998, -0.00383598, -0.00359188, -0.00337324, -0.00317647,
-0.00299859, -0.00283712, -0.00269001, -0.00255551, -0.00243214,
-0.00231864])
>>> # verified for points [[5,10,20,25]] at 4 decimals with Bhardwaj, Swanson, Journal of Eonometrics 2006
'''
print(lpol_fiar(0.4, n=20))
print(lpol_fima(-0.4, n=20))
print(np.sum((lpol_fima(-0.4, n=n)[1:] + riinv[1:])**2)) #different signs
print(np.sum((lpol_fiar(0.4, n=n)[1:] - riinv[1:])**2)) #corrected signs
#test is now in statsmodels.tsa.tests.test_arima_process
from statsmodels.tsa.tests.test_arima_process import test_fi
test_fi()
ar_true = [1, -0.4]
ma_true = [1, 0.5]
ar_desired = arma_impulse_response(ma_true, ar_true)
ar_app, ma_app, res = ar2arma(ar_desired,
2,
1,
n=100,
mse='ar',
start=[0.1])
print(ar_app, ma_app)
ar_app, ma_app, res = ar2arma(ar_desired,
2,
2,
-0.029952 , -0.0229632 , -0.01837056, -0.01515571, -0.01279816,
-0.01100641, -0.0096056 , -0.00848495, -0.00757118, -0.00681406,
-0.00617808, -0.0056375 , -0.00517324, -0.00477087, -0.00441934,
-0.00410998, -0.00383598, -0.00359188, -0.00337324, -0.00317647,
-0.00299859, -0.00283712, -0.00269001, -0.00255551, -0.00243214,
-0.00231864])
>>> # verified for points [[5,10,20,25]] at 4 decimals with Bhardwaj, Swanson, Journal of Eonometrics 2006
'''
print(lpol_fiar(0.4, n=20))
print(lpol_fima(-0.4, n=20))
print(np.sum((lpol_fima(-0.4, n=n)[1:] + riinv[1:])**2)) #different signs
print(np.sum((lpol_fiar(0.4, n=n)[1:] - riinv[1:])**2)) #corrected signs
#test is now in statsmodels.tsa.tests.test_arima_process
from statsmodels.tsa.tests.test_arima_process import test_fi
test_fi()
ar_true = [1, -0.4]
ma_true = [1, 0.5]
ar_desired = arma_impulse_response(ma_true, ar_true)
ar_app, ma_app, res = ar2arma(ar_desired, 2,1, n=100, mse='ar', start=[0.1])
print(ar_app, ma_app)
ar_app, ma_app, res = ar2arma(ar_desired, 2,2, n=100, mse='ar', start=[-0.1, 0.1])
print(ar_app, ma_app)
ar_app, ma_app, res = ar2arma(ar_desired, 2,3, n=100, mse='ar')#, start = [-0.1, 0.1])
print(ar_app, ma_app)
slow = 1
if slow: