Hey, The ets function of the forecast package has options to chose only between "mse", "amse","lik" and "nmse" as the criteria for model selection. However I want MAPE to be the criteria. Is there any implementation of this already? Else if I have to write a function for myself, which is the best way to go about it? Thank, Phani -- A. Phani Kishan 3rd Year B.Tech Dept. of Computer Science & Engineering IIT MADRAS Ph: +919962363545 [[alternative HTML version deleted]]