#'
#' @title Level Forecaster
#'
-#' @description Return flat serie of last observed level (on similar day).
-#' Inherits \code{\link{ShapeForecaster}}
+#' @description Return flat serie of last observed level. Inherits \code{\link{ShapeForecaster}}
LevelForecaster = setRefClass(
Class = "LevelForecaster",
contains = "Forecaster",
{
callSuper(...)
},
- predict = function(today, memory, horizon, all_memory=TRUE, ...)
+ predict = function(today, memory, horizon, ...)
{
- #return last (similar) day level, or on all memory if all_memory==TRUE
+ #return last day level
first_day = max(1, today-memory)
- index = today-7 + 1
- if (all_memory)
- {
- sum_level = 0.
- nb_series = 0
- }
+ same_day = ifelse(hasArg("same_day"), list(...)$same_day, TRUE)
+ index = today - ifelse(same_day,6,0)
repeat
{
{
- last_similar_serie = data$getSerie(index)[1:horizon]
- index = index - 7
+ last_serie = data$getSerie(index)[1:horizon]
+ index = index - ifelse(same_day,7,1)
};
#TODO: next test is too strict
- if (!any(is.na(last_similar_serie)))
- {
- if (all_memory)
- {
- sum_level = sum_level + mean(last_similar_serie)
- nb_series = nb_series + 1
- }
- else
- return (rep(mean(last_similar_serie), horizon))
- };
+ if (!any(is.na(last_serie)))
+ return (rep(mean(last_serie), horizon));
if (index < first_day)
- {
- if (all_memory)
- return (rep(sum_level / nb_series, horizon))
return (NA)
- }
}
}
)