I tried my data into an $ARMA$ model which is turned out to be $ARMA(2,3)$. I want to extract the model from the parameters I got in the pic (without any transformation). Is it right if I write the model like this?
$Y_t = 0.6218 + 0.126Y_{t-1} + 0.3964Y_{t-2} + e_t + 0.1488e_{t-1} + 0.9569e_{t-2} - 0.1057e_{t-3}$
Furthermore, how do I get $e_t$ (error of prediction on period-t) since I haven't got the prediction value yet.. I mean, $Y_t$ is something I want to predict, right?
forecast()
in order to come up with a forecast. $\endgroup$