From 6a2f682552f0a09a9508fef91485400f69a91001 Mon Sep 17 00:00:00 2001
From: Steven Silvester <steven.silvester@ieee.org>
Date: Sun, 28 Sep 2014 04:56:56 -0500
Subject: [PATCH] Add description for networkx optional requirment

---
 DEPENDS.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/DEPENDS.txt b/DEPENDS.txt
index 027bfa49..8cf3388d 100644
--- a/DEPENDS.txt
+++ b/DEPENDS.txt
@@ -33,7 +33,8 @@ Optional Requirements
 You can use this scikit with the basic requirements listed above, but some
 functionality is only available with the following installed:
 
-* `NetworkX >= 1.8 <https://networkx.github.io>`__
+* `NetworkX >= 1.8 <https://networkx.github.io>`__ is needed to use region
+adjacency graph (RAG)-based segmentation functions.
 
 * `Matplotlib >= 1.0 <http://matplotlib.sf.net>`__ is needed to generate the
 examples in the documentation.