fix report.gj
[talweg.git] / pkg / R / J_Persistence.R
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1#' getPersistenceJumpPredict
2#'
3#' Analog of the PersistenceForecaster: predict the jump after last observed value either
4#' by re-applying the last jump between similar day and its follower (if argument
5#' "same_day" is TRUE), or by re-using the very last observed jump (when "same_day" =
6#' FALSE).
3d69ff21 7#'
99f83c9a 8#' @inheritParams computeForecast
e030a6e3 9#' @inheritParams getZeroJumpPredict
546b0cb6 10#'
3ddf1c12 11#' @aliases J_Persistence
102bcfda 12#'
e030a6e3 13getPersistenceJumpPredict = function(data, today, memory, horizon, params, ...)
3d69ff21 14{
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15 #return gap between end of similar day curve and first day of tomorrow (in the past)
16 first_day = max(1, today-memory)
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17 same_day = ifelse(hasArg("same_day"), list(...)$same_day, TRUE)
18 index = today - ifelse(same_day,7,1)
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19 repeat
20 {
21 {
e5aa669a 22 last_serie_end = tail( data$getSerie(index), 1)
2057c793 23 last_tomorrow_begin = head( data$getSerie(index+1), 1)
e5aa669a 24 index = index - ifelse(same_day,7,1)
09cf9c19 25 };
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26 if (!is.na(last_serie_end) && !is.na(last_tomorrow_begin))
27 return (last_tomorrow_begin - last_serie_end);
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28 if (index < first_day)
29 return (NA)
30 }
3d69ff21 31}