Various documentation updates:
- update the tutorial
- update doc of deprecated cwise function
- update cwise doc snippets
diff --git a/doc/snippets/Cwise_abs.cpp b/doc/snippets/Cwise_abs.cpp
index 7f94dbd..0aeec3a 100644
--- a/doc/snippets/Cwise_abs.cpp
+++ b/doc/snippets/Cwise_abs.cpp
@@ -1,2 +1,2 @@
-Vector3d v(1,-2,-3);
-cout << v.cwise().abs() << endl;
+Array3d v(1,-2,-3);
+cout << v.abs() << endl;