From b3ebf9eec32a84ce5b8f157370a58d1ad66ef236 Mon Sep 17 00:00:00 2001
From: xiani <xianionline@gmail.com>
Date: Tue, 1 Nov 2016 18:03:06 +0200
Subject: [PATCH 1/2] betweenness-centrality.js: fixed "max"(undefined) was
 never greater anything betweenness-centrality.js: betweennessNormalized() if
 max is zero - return zero closeness-centrality.js: closeness() if max is zero
 - return zero

---
 src/collection/algorithms/betweenness-centrality.js | 5 ++++-
 src/collection/algorithms/closeness-centrality.js   | 3 +++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/collection/algorithms/betweenness-centrality.js b/src/collection/algorithms/betweenness-centrality.js
index 980f59fb2..a803ca23a 100644
--- a/src/collection/algorithms/betweenness-centrality.js
+++ b/src/collection/algorithms/betweenness-centrality.js
@@ -27,7 +27,7 @@ var elesfn = ({
     var V = this.nodes();
     var A = {};
     var _C = {};
-    var max;
+    var max = 0;
     var C = {
       set: function( key, val ){
         _C[ key ] = val;
@@ -165,6 +165,9 @@ var elesfn = ({
       },
 
       betweennessNormalized: function( node ){
+        if ( max == 0 )
+          return 0;
+
         if( is.string( node ) ){
           var node = cy.filter( node ).id();
         } else {
diff --git a/src/collection/algorithms/closeness-centrality.js b/src/collection/algorithms/closeness-centrality.js
index 6aa6b5dd0..7e2f43971 100644
--- a/src/collection/algorithms/closeness-centrality.js
+++ b/src/collection/algorithms/closeness-centrality.js
@@ -47,6 +47,9 @@ var elesfn = ({
 
     return {
       closeness: function( node ){
+		if( maxCloseness == 0 )
+			return 0;
+
         if( is.string( node ) ){
           // from is a selector string
           var node = (cy.filter( node )[0]).id();

From 27ccaa32d4700b10ba270b0ddbd2d24caa04a1c6 Mon Sep 17 00:00:00 2001
From: xiani <xianionline@gmail.com>
Date: Tue, 1 Nov 2016 18:39:58 +0200
Subject: [PATCH 2/2] if max is zero - return zero

---
 src/collection/algorithms/degree-centrality.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/collection/algorithms/degree-centrality.js b/src/collection/algorithms/degree-centrality.js
index 06186405d..e22817e7b 100644
--- a/src/collection/algorithms/degree-centrality.js
+++ b/src/collection/algorithms/degree-centrality.js
@@ -36,6 +36,9 @@ var elesfn = ({
 
       return {
         degree: function( node ){
+          if( maxDegree == 0 )
+            return 0;
+
           if( is.string( node ) ){
             // from is a selector string
             var node = (cy.filter( node )[0]).id();
@@ -70,6 +73,9 @@ var elesfn = ({
 
       return {
         indegree: function( node ){
+          if ( maxIndegree == 0 )
+            return 0;
+
           if( is.string( node ) ){
             // from is a selector string
             var node = (cy.filter( node )[0]).id();
@@ -81,6 +87,9 @@ var elesfn = ({
           return indegrees[ node ] / maxIndegree;
         },
         outdegree: function( node ){
+          if ( maxOutdegree == 0 )
+            return 0;
+
           if( is.string( node ) ){
             // from is a selector string
             var node = (cy.filter( node )[0]).id();