"Rad" wrote in message <firstname.lastname@example.org>... > Hello, I?m trying to determine the feedback and input delays for a 3-input 1-output NARX network using target-target auto-correlation and input/target cross-correlation, respectively. For each input/target pair, the max. cross-correlation (peak) value occurs at a different lag. Given that all input delays must be the same for a NARX network, which value out of the 3 different lags should I select? The smallest one? > For the target-target auto-correlation, the max. lag is at 0, and the value of the auto-correlation coefficients decreases as the number of lags increase. How is the proper feedback delay selected in this case? > Sorry if these questions seem trivial; any help would greatly be appreciated. Thank you!