Add examples for API documentation of MatrixBase::cwiseXxx() methods.
diff --git a/doc/snippets/MatrixBase_cwiseMax.cpp b/doc/snippets/MatrixBase_cwiseMax.cpp
new file mode 100644
index 0000000..3c95681
--- /dev/null
+++ b/doc/snippets/MatrixBase_cwiseMax.cpp
@@ -0,0 +1,2 @@
+Vector3d v(2,3,4), w(4,2,3);
+cout << v.cwiseMax(w) << endl;