Hello again R People: I fit an ARIMA model on a particular data set with x_1, ....,x_n. Point x_(n+1) becomes available. I now want to produce a forecast without updating the model. Is there a way to do that within R, or do I need to write my own function, please? Thanks! Sincerely, erin -- Erin Hodgess Associate Professor Department of Mathematical and Statistics University of Houston - Downtown mailto: erinm.hodgess@gmail.com [[alternative HTML version deleted]]