tsa.arima_process.index2lpol()

statsmodels.tsa.arima_process.index2lpol

statsmodels.tsa.arima_process.index2lpol(coeffs, index) [source]

expand coefficients to lag poly

Parameters:	coeffs : array non-zero coefficients of lag polynomial index : array index (lags) of lagpolynomial with non-zero elements ar : array_like coefficients of lag polynomial
Returns:	ar : array_like coefficients of lag polynomial