diff --git a/doc/src/Regression/Regression.do.txt b/doc/src/Regression/Regression.do.txt
index 3c3a88703..881986a21 100644
--- a/doc/src/Regression/Regression.do.txt
+++ b/doc/src/Regression/Regression.do.txt
@@ -712,6 +712,9 @@ How can we use the singular value decomposition to find the parameters $\beta_j$
 !eblock
 
 
+Add codes and discuss this in connection with lasso and ridge
+
+
 !split
 ===== Lasso and Ridge regression =====