adding numeral.js as a dependency

bower.json

@@ -49,7 +49,8 @@
     "requirejs": "~2.1.10",
     "requirejs-text": "~2.0.10",
     "lodash-deep": "spenceralger/lodash-deep#compat",
-    "marked": "~0.3.2"
+    "marked": "~0.3.2",
+    "numeral": "~1.5.3"
   },
   "devDependencies": {}
 }

src/kibana/components/vislib/lib/y_axis.js

@@ -2,6 +2,7 @@ define(function (require) {
   return function YAxisFactory(d3, Private) {
     var _ = require('lodash');
     var $ = require('jquery');
+    var numeral = require('numeral');
 
     var ErrorHandler = Private(require('components/vislib/lib/_error_handler'));
 
@@ -58,11 +59,7 @@ define(function (require) {
      * @returns {*}
      */
     YAxis.prototype.formatAxisLabel = function (d) {
-      var formatNumber = d3.format('s');
-      var str = formatNumber(d);
-      var replaceG = str.replace(/G/i, 'B');
-
-      return (d >= 1e9 && d < 1e12) ? replaceG : str;
+      return numeral(d).format('0.[0]a');
     };
 
     /**

src/kibana/require.config.js

@@ -34,7 +34,8 @@ require.config({
     'ng-clip': 'bower_components/ng-clip/src/ngClip',
     text: 'bower_components/requirejs-text/text',
     zeroclipboard: 'bower_components/zeroclipboard/dist/ZeroClipboard',
-    marked: 'bower_components/marked/lib/marked'
+    marked: 'bower_components/marked/lib/marked',
+    numeral: 'bower_components/numeral/numeral'
   },
   shim: {
     angular: {

test/unit/specs/vislib/lib/y_axis.js

@@ -198,16 +198,14 @@ define(function (require) {
 
     describe('formatAxisLabel method', function () {
       var num = 1e9;
-      var re = /B/i;
       var val;
-      var str;
 
       beforeEach(function () {
         val = yAxis.formatAxisLabel(num);
       });
 
       it('should return a string with suffix B', function () {
-        expect(val).to.be('1B');
+        expect(val).to.be('1b');
       });
     });