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