From 0070a73004a5458b8b616aaedf283db85d06e0c6 Mon Sep 17 00:00:00 2001
From: James Hensman <james.hensman@gmail.com>
Date: Thu, 12 Sep 2013 10:20:28 +0100
Subject: [PATCH] Fixed Alans checkgrad bug

---
 GPy/core/model.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/GPy/core/model.py b/GPy/core/model.py
index c31ea209..2e70e7c2 100644
--- a/GPy/core/model.py
+++ b/GPy/core/model.py
@@ -458,7 +458,7 @@ class Model(Parameterized):
             numerical_gradient = (f1 - f2) / (2 * dx)
             global_ratio = (f1 - f2) / (2 * np.dot(dx, gradient))
 
-            return (np.abs(1. - global_ratio) < tolerance) or (np.abs(gradient - numerical_gradient).mean() - 1) < tolerance
+            return (np.abs(1. - global_ratio) < tolerance) or (np.abs(gradient - numerical_gradient).mean() < tolerance)
         else:
             # check the gradient of each parameter individually, and do some pretty printing
             try: