update ndarray stack Doc for #11925

python/mxnet/ndarray_doc.py

@@ -105,6 +105,21 @@ class BroadcastToDoc(NDArrayDoc):
     (2L, 2L, 2L, 3L)
     """
 
+class StackDoc(NDArrayDoc):
+    """
+    Example
+    --------
+    Join a sequence of arrays along a new axis.
+    >>> x = mx.nd.array([1, 2])
+    >>> y = mx.nd.array([3, 4])
+    >>> stack(x, y)
+    [[1, 2],
+     [3, 4]]
+    >>> stack(x, y, axis=1)
+    [[1, 3],
+     [2, 4]]
+    """
+
 class CustomDoc(NDArrayDoc):
     """
     Example