#' Persistence Forecaster
#'
#' Look for the most recent similar day in the past, and return its corresponding curve.
-#' "Similar day" means "same day in the week".
#'
+#' There are two variations, depending whether "similar day" means "same day in the week"
+#' or "most recent day" (regardless of day type). The corresponding argument is named
+#' "same_day": a value of TRUE implies the former interpretation (same day in week).
+#' If the last similar day has missing values, the next one is searched, and so on until
+#' one full serie is found (if no one is found, NA is returned).
+#'
+#' @docType class
#' @format R6 class, inherits Forecaster
-#' @alias F_Persistence
+#' @aliases F_Persistence
#'
PersistenceForecaster = R6::R6Class("PersistenceForecaster",
inherit = Forecaster,