diff --git a/doc/snippets/MatrixBase_asDiagonal.cpp b/doc/snippets/MatrixBase_asDiagonal.cpp
new file mode 100644
index 0000000..b01082d
--- /dev/null
+++ b/doc/snippets/MatrixBase_asDiagonal.cpp
@@ -0,0 +1 @@
+cout << Matrix3i(Vector3i(2,5,6).asDiagonal()) << endl;