+
+#' Initialize empty Data object
+initialize = function(self, private, ...)
+{
+ invisible(self)
+}
+
+#' Number of series in the dataset
+getSize = function(self, private)
+ length(private$.data)
+
+#' 'Standard' horizon, from t+1 to midnight
+getStdHorizon = function(self, private)
+ 24 - as.POSIXlt( private$.data[[1]]$time[1] )$hour + 1
+
+#' Acquire a new vector of lists (time, centered_serie, level, exo, exo_hat)