[R] filter ARMA process

[Matthias Budinger]

Hi

given an ARMA process and the AR and MA coefficients I need the residuals.
arima() calculates the residuals together with the best AR and MA
coefficients, but I need the coefficients to take known values.
In S-PLUS there is a function arima.filt(). Is there something similar in
R?

Thanks for any help,
Matthias Budinger