'update'
[talweg.git] / pkg / R / F_Persistence.R
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e030a6e3 1#' @include Forecaster.R
3d69ff21 2#'
25b75559 3#' Persistence Forecaster
3d69ff21 4#'
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5#' Return the last centered (similar) day curve.
6#' Inherits \code{\link{Forecaster}}
546b0cb6 7#'
25b75559 8PersistenceForecaster = R6::R6Class("PersistenceForecaster",
a66a84b5 9 inherit = Forecaster,
3d69ff21 10
25b75559 11 public = list(
98e958ca 12 predictShape = function(data, today, memory, horizon, ...)
3d69ff21 13 {
e5aa669a 14 # Return centered last (similar) day curve, avoiding NAs until memory is run
09cf9c19 15 first_day = max(1, today-memory)
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16 same_day = ifelse(hasArg("same_day"), list(...)$same_day, TRUE)
17 # If 'same_day', get the last known future of similar day: -7 + 1 == -6
18 index = today - ifelse(same_day,6,0)
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19 repeat
20 {
21 {
98e958ca 22 last_serie = data$getCenteredSerie(index)[1:horizon]
e5aa669a 23 index = index - ifelse(same_day,7,1)
09cf9c19 24 };
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25 if (!any(is.na(last_serie)))
26 return (last_serie);
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27 if (index < first_day)
28 return (NA)
29 }
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30 }
31 )
32)