Hello, my name is Giusy and it's the first time I post in this forum. I'm a beginner with R, I have to use it to analyse time series and I need some help about these problems: 1. In my time series there are some NA values, but functions (arimaId, arima,..) seem not to work in this case...what could I do? 2. I have to manage with time series with more than one seasonality, for example weekly and monyhly, but I think arima work with only one seasonality...does anyone know what to do? Thank you very much Giusy -- View this message in context: http://www.nabble.com/Time-series-analysis-tf4474219.html#a12756583 Sent from the R help mailing list archive at Nabble.com.