#' \item Neighbors : use values from the k closest neighbors' tomorrows
#' \item Average : global average of all the (similar) "tomorrow of past"
#' \item Zero : just output 0 (benchmarking purpose)
#' \item Neighbors : use values from the k closest neighbors' tomorrows
#' \item Average : global average of all the (similar) "tomorrow of past"
#' \item Zero : just output 0 (benchmarking purpose)