statsmodels.tsa.arima_process.ArmaProcess.arma2ar¶ ArmaProcess.arma2ar(lags=None)[source]¶ A finite-lag AR approximation of an ARMA process. Parameters lagsintThe number of coefficients to calculate. Returns ndarrayThe coefficients of AR lag polynomial with nobs elements. Notes Equivalent to arma_impulse_response(ma, ar, leads=100)