forecast_in_sample.py

# Create ARIMA mean forecast
arima_pred = arima_results.get_prediction(start=-90, dynamic=True)
arima_mean = arima_pred.predicted_mean

# Create SARIMA mean forecast
sarima_01_pred = sarima_01_results.get_prediction(start=-90, dynamic=True)
sarima_01_mean = sarima_01_pred.predicted_mean

# Create SARIMA mean forecast
sarima_02_pred = sarima_02_results.get_prediction(start=-90, dynamic=True)
sarima_02_mean = sarima_02_pred.predicted_mean