--- /dev/null
+#' @include Forecaster.R
+#'
+#' Persistence Forecaster
+#'
+#' Return the last centered (similar) day curve.
+#' Inherits \code{\link{Forecaster}}
+PersistenceForecaster = R6::R6Class("PersistenceForecaster",
+ inherit = Forecaster,
+
+ public = list(
+ predictShape = function(data, today, memory, horizon, ...)
+ {
+ # Return centered last (similar) day curve, avoiding NAs until memory is run
+ first_day = max(1, today-memory)
+ same_day = ifelse(hasArg("same_day"), list(...)$same_day, TRUE)
+ # If 'same_day', get the last known future of similar day: -7 + 1 == -6
+ index = today - ifelse(same_day,6,0)
+ repeat
+ {
+ {
+ last_serie = data$getCenteredSerie(index)[1:horizon]
+ index = index - ifelse(same_day,7,1)
+ };
+ if (!any(is.na(last_serie)))
+ return (last_serie);
+ if (index < first_day)
+ return (NA)
+ }
+ }
+ )
+)