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#general
Title
# general
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Farzad E

05/15/2023, 3:02 PM
Has anyone tried week numbers (sin & cos) as exogenous variables with ARIMA? Does it generally improve the forecast?
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fede (nixtla) (they/them)

05/17/2023, 8:59 PM
hey @Farzad E! That might be a good approach, but in the end, it depends on the data. here’s an interesting reference on the topic: https://otexts.com/fpp3/complexseasonality.html#dynamic-harmonic-regression-with-multiple-seasonal-periods Also, you could use the MSTL model to capture the seasonal components of your time series.
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Farzad E

05/17/2023, 9:00 PM
@fede (nixtla) (they/them) much appreciated! Thanks!
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