diff --git a/doc/snippets/Cwise_tanh.cpp b/doc/snippets/Cwise_tanh.cpp
new file mode 100644
index 0000000..30cd045
--- /dev/null
+++ b/doc/snippets/Cwise_tanh.cpp
@@ -0,0 +1,2 @@
+ArrayXd v = ArrayXd::LinSpaced(5,0,1);
+cout << tanh(v) << endl;