new version, persistence -7 days
[talweg.git] / R / F_Level.R
CommitLineData
e030a6e3
BA
1#' @include Forecaster.R
2#'
3#' @title Level Forecaster
4#'
5#' @description Return flat serie of last observed level (on similar day).
6#' Inherits \code{\link{ShapeForecaster}}
7LevelForecaster = setRefClass(
8 Class = "LevelForecaster",
9 contains = "Forecaster",
10
11 methods = list(
12 initialize = function(...)
13 {
14 callSuper(...)
15 },
16 predict = function(today, memory, horizon, all_memory=TRUE, ...)
17 {
18 #return last (similar) day level, or on all memory if all_memory==TRUE
19 first_day = max(1, today-memory)
20 index = today-7 + 1
21 if (all_memory)
22 {
23 sum_level = 0.
24 nb_series = 0
25 }
26 repeat
27 {
28 {
29 last_similar_serie = data$getSerie(index)[1:horizon]
30 index = index - 7
31 };
32 #TODO: next test is too strict
33 if (!any(is.na(last_similar_serie)))
34 {
35 if (all_memory)
36 {
37 sum_level = sum_level + mean(last_similar_serie)
38 nb_series = nb_series + 1
39 }
40 else
41 return (rep(mean(last_similar_serie), horizon))
42 };
43 if (index < first_day)
44 {
45 if (all_memory)
46 return (rep(sum_level / nb_series, horizon))
47 return (NA)
48 }
49 }
50 }
51 )
52)