  The simulation of the continuation of a given time series is useful for many
practical applications. But no standard procedure for this task is suggested in
the literature. It is therefore demonstrated how to use the seasonal ARIMA
process to simulate the continuation of an observed time series. The R-code
presented uses well-known modeling procedures for ARIMA models and conditional
simulation of a SARIMA model with known parameters. A small example
demonstrates the correctness and practical relevance of the new idea.
