"Pedro" wrote in message <email@example.com>... > I've changed Elman to NARX and the problem is solved. But I'm still thinking why the output is so small. > > To answer your question: >I don't know why, the output is really really small if we compare it with the target or even >the input. Can it be the weights or the bias? Or maybe the train option? > > Do you mean max(abs(cell2mat(Y))) << max(abs(cell2mat(T))) ? > > Yes. Cell2mat(Y) <<<<<<<< cell2mat(T). But with the NARX, this doesn't happen. I don't know why. > > Thanks for answering.