[R] predict a MA timeseries

[user84]

Hi, 
could anyone tell me how predict() predicts the new value(s), of a MA(1)
arima-modell.
its really easy to make it with an AR(1), knowing the last term, but how can
i or R know the last error?

It would also help if somebody could tell me how to find the "open" source
of the function predict().

Thanks and sorry for my poor english.

--
View this message in context: http://r.789695.n4.nabble.com/predict-a-MA-timeseries-tp3544071p3544071.html
Sent from the R help mailing list archive at Nabble.com.