问题
I am new to the time series with using the SARIMA model, and I followed the tutorial to build the model and trying to forecast the future trend. The thing goes well at the beginning but when produced the results it shows the slope straight line. and I build it on the Jupyter NoteBook
First thing I checked my data, and make the data visually, but in fact, it seems the right data then I tried to change the values of P, D, Q and failed again
https://github.com/Dongmingguoguo/Prediciton
https://github.com/Dongmingguoguo/Prediciton Here is the GitHub link please go to check and my expectancy is to make the forecast for the next 3days.
回答1:
This happen when your data doesn't have strong seasonality and model finds difficult to predict the future there fore it simply take average of your previous values and predict as future. There fore you are getting straight line.
来源：https://stackoverflow.com/questions/56583538/arima-produced-slope-straight-line