# How to determine or diagnose that time series data contain seasonality pattern for SARIMA in R by function

I want to ask about seasonal ARIMA (SARIMA) in R function how to determine that time series data has affected or influenced by seasonal pattern

Thank you very much

• Look at the help file of function auto.arima of "forecast" package in R. There you will find a couple of tests for seasonality. – Richard Hardy Dec 2 '16 at 8:59