pkg/R/F_Average.R

   1 #' @include Forecaster.R
   2 #'
   3 #' @title Average Forecaster
   4 #'
   5 #' @description Return the (pointwise) average of the all the (similar) centered day curves
   6 #'   in the past. Inherits \code{\link{Forecaster}}
   7 AverageForecaster = setRefClass(
   8     Class = "AverageForecaster",
   9     contains = "Forecaster",
  10
  11     methods = list(
  12         initialize = function(...)
  13         {
  14             callSuper(...)
  15         },
  16         predictShape = function(today, memory, horizon, ...)
  17         {
  18             avg = rep(0., horizon)
  19             first_day = max(1, today-memory)
  20             index = today-7 + 1
  21             nb_no_na_series = 0
  22             repeat
  23             {
  24                 {
  25                     serie_on_horizon = data$getCenteredSerie(index)[1:horizon]
  26                     index = index - 7
  27                 };
  28                 if (!any(is.na(serie_on_horizon)))
  29                 {
  30                     avg = avg + serie_on_horizon
  31                     nb_no_na_series = nb_no_na_series + 1
  32                 };
  33                 if (index < first_day)
  34                     break
  35             }
  36             avg / nb_no_na_series
  37         }
  38     )
  39 )