From a9ca4b70f470c243a554c27f02fa9c48da59df7b Mon Sep 17 00:00:00 2001
From: Michael Droettboom <mdboom@gmail.com>
Date: Mon, 23 Nov 2015 08:54:21 -0500
Subject: [PATCH] Fix #5524: Use large, but finite, values

for contour extensions
---
 lib/matplotlib/contour.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/matplotlib/contour.py b/lib/matplotlib/contour.py
index cfb19bf95001..75659a3d7323 100644
--- a/lib/matplotlib/contour.py
+++ b/lib/matplotlib/contour.py
@@ -1232,9 +1232,9 @@ def _process_levels(self):
         # ...except that extended layers must be outside the
         # normed range:
         if self.extend in ('both', 'min'):
-            self.layers[0] = -np.inf
+            self.layers[0] = -1e150
         if self.extend in ('both', 'max'):
-            self.layers[-1] = np.inf
+            self.layers[-1] = 1e150
 
     def _process_colors(self):
         """