From ebec3ede8afaaffe8b90e682c48c3c69e5ad6a56 Mon Sep 17 00:00:00 2001
From: Marco Ratto <marco.ratto@ec.europa.eu>
Date: Thu, 29 Oct 2020 17:13:00 +0100
Subject: [PATCH] allow negative lag (i.e. a lead)

---
 matlab/utilities/dataset/lagged.m | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/matlab/utilities/dataset/lagged.m b/matlab/utilities/dataset/lagged.m
index 4f17d7eeb..18e3ca98b 100644
--- a/matlab/utilities/dataset/lagged.m
+++ b/matlab/utilities/dataset/lagged.m
@@ -31,4 +31,8 @@ if nargin==1
 end
 
 x=x(:);
-xlag=[NaN(n,1); x(1:end-n)];
\ No newline at end of file
+if n>0
+xlag=[NaN(n,1); x(1:end-n)];
+else
+xlag=[x(abs(n)+1:end); NaN(abs(n),1)];
+end
\ No newline at end of file