Various documentation updates:
- update the tutorial
- update doc of deprecated cwise function
- update cwise doc snippets
diff --git a/doc/snippets/Cwise_greater.cpp b/doc/snippets/Cwise_greater.cpp
index 54641e1..40ad029 100644
--- a/doc/snippets/Cwise_greater.cpp
+++ b/doc/snippets/Cwise_greater.cpp
@@ -1,2 +1,2 @@
-Vector3d v(1,2,3), w(3,2,1);
-cout << (v.cwise()>w) << endl;
+Array3d v(1,2,3), w(3,2,1);
+cout << (v>w) << endl;