Hello,

In order to do a future forecast based on my past Time Series data sets
(salespricesproduct1, salespricesproduct2, etc..), I used arima() functions
with different parameter combinations which give the smallest AIC. I also
used auto.arima() which finds the parameters with the smallest AICs.  But
unfortuanetly I could not get satisfactory forecast() results, even
sometimes catastrophic results which made me very disappointed.

Note that, I basically use plot(forecast(auto.arima(invecTS), 24)) statement
to construct model with arima, forecast 24 future values & plot the results.

Could you suggest me better forecasting methods that I can apply in R ?

Thanks, best regards..

Ozcan

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