From abfdadc4c543e937523e5210ee4659113a493ccf Mon Sep 17 00:00:00 2001
From: David Rotermund <54365609+davrot@users.noreply.github.com>
Date: Wed, 27 Dec 2023 15:33:44 +0100
Subject: [PATCH] Update README.md

Signed-off-by: David Rotermund <54365609+davrot@users.noreply.github.com>
---
 numpy/nditer/README.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/numpy/nditer/README.md b/numpy/nditer/README.md
index 7af4a33..b7315c7 100644
--- a/numpy/nditer/README.md
+++ b/numpy/nditer/README.md
@@ -842,3 +842,15 @@ Output:
 [ 3 12 21]
 ```
 
+Investigation of ​op_axes=[None, [0, -1]] because I don't understand what is happening here:
+
+|||
+|---|---|
+|[None, [0, -1]] | [ 3 12 21]|
+|[[0, 1], [0, -1]] | [ 3 12 21]|
+|[[1, 0], [-1, 0]] | [ 3 12 21]|
+|[None, [-1, 0]] | [ 9 12 15]|
+|[[0, 1], [-1, 0]] | [ 9 12 15]|
+|[[1,0 ], [0,-1]] | [ 9 12 15]|
+
+