+#' A Forecaster object encapsulates parameters (which can be of various kinds, for
+#' example "Neighbors" method stores informations about the considered neighborhood for
+#' the current prediction task) and one main function: \code{predictSerie()}. This last
+#' function (by default) calls \code{predictShape()} to get a forecast of a centered
+#' serie, and then calls the "jump prediction" function if it's provided -- see "field"
+#' section -- to adjust it based on the last observed values. The main method in derived
+#' forecasters is \code{predictShape()}; see 'Methods' section.
+#'
+#' @usage # Forecaster$new(pjump) #warning: predictShape() is unimplemented
+#'
+#' @field .params List of computed parameters (if applicable).
+#' @field .pjump Function: how to predict the jump at day interface? The arguments of
+#' this function are -- in this order:
+#' \itemize{
+#' \item data: object output of \code{getData()},
+#' \item today: index of the current day in data (known until predict_from-1),
+#' \item memory: number of days to use in the past (including today),
+#' \item predict_from: first time step to predict (in [1,24])
+#' \item horizon: last time step to predict (in [predict_from,24]),
+#' \item params: optimized parameters in the main method \code{predictShape()},
+#' \item ...: additional arguments.
+#' }
+#' .pjump returns an estimation of the jump after the last observed value.
+#'
+#' @section Methods:
+#' \describe{
+#' \item{\code{initialize(data, pjump)}}{
+#' Initialize a Forecaster object with a Data object and a jump prediction function,
+#' or NULL if \code{predictShape()} returns an adjusted curve.}
+#' \item{\code{predictSerie(data,today,memory,predict_from,horizon,...)}}{
+#' Predict the next curve (at index today) from predict_from to horizon (hours), using
+#' \code{memory} days in the past.}
+#' \item{\code{predictShape(data,today,memory,predict_from,horizon,...)}}{
+#' Predict the shape of the next curve (at index today) from predict_from to horizon
+#' (hours), using \code{memory} days in the past.}
+#' \item{\code{getParameters()}}{
+#' Return (internal) parameters.}
+#' }
+#'
+#' @docType class
+#' @format R6 class
+#'
+Forecaster = R6::R6Class("Forecaster",
+ private = list(
+ .params = list(),
+ .pjump = NULL