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    Simple Question. Prediction intervals in R.

    Hi, I'm using R and I've fitted a seasonal Arima model to a time series. I wish to compute a prediction for the next 12 values of the time series with 95% confidence interval. Can someone advise me what command to use? Also could someone point me to where I might find out the answers to similar...
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    Simple Question Seasonal Autoregressive Model

    Hi, I hope I'm posting this in an appropriate place. It's not exactly linear regression. If you have a seasonal moving average model like \displaystyle ARIMA(0,0,0)(0,0,1)_{12}, and you want to find the expectation of \displaystyle y_t, then you just use the fact that expectation is a linear...