Re: [R] problem modeling time series

2007-11-21 Thread Prof Brian Ripley
You appear to have fitted a seasonal model to a non-seasonal time series. See ?ts for how to set up a time series (a step you seem to have omitted), and ?arima for how to specify the model in R. Otherwise, this is not the place for a tutorial on fitting time series, and many of us do not offer s

[R] problem modeling time series

2007-11-20 Thread eugen pircalabelu
Good afternoon! I'm trying to model a ts but unfortunately i'.m very new to this kind of modeling so i 'll be very grateful if you have an advice. This was my syntax: t<-c(16115,17391,19011,20256,19034,18851,20016,18088,19166,21163,18463,19397,15800,16113,18879,20598,17252,19753,19110,19605,2