X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=pkg%2FR%2FJ_Zero.R;h=01ba9e30595335126f06b78bfc489fef7d48c8d4;hb=a3344f7591f6f4b3d337a69e4a568e9b16e33415;hp=fb15e3d6f498330d1ce550d6f7579cecf4f55271;hpb=3ddf1c12af0c167fe7d3bb59e63258550270cfc5;p=talweg.git

diff --git a/pkg/R/J_Zero.R b/pkg/R/J_Zero.R
index fb15e3d..01ba9e3 100644
--- a/pkg/R/J_Zero.R
+++ b/pkg/R/J_Zero.R
@@ -1,6 +1,6 @@
 #' getZeroJumpPredict
 #'
-#' Just predict zero "jump" (for reference, benchmarking at least).
+#' "Reset level to 0": jump by -A where A is the last observed value.
 #'
 #' @inheritParams computeForecast
 #' @param today Index of the current day (predict tomorrow)
@@ -8,7 +8,8 @@
 #'
 #' @aliases J_Zero
 #'
-getZeroJumpPredict = function(data, today, memory, horizon, params, ...)
+getZeroJumpPredict = function(data, today, memory, predict_from, horizon, params, ...)
 {
-	0
+	list(...)$first_pred - ifelse( predict_from >= 2,
+		data$getSerie(today)[predict_from-1], tail(data$getSerie(today-1),1) )
 }