DC.js - Grouping

HTML

<script src="http://nickqizhu.github.io/dc.js/js/d3.js"></script>
<script src="http://nickqizhu.github.io/dc.js/js/dc.js"></script>
<script src="http://nickqizhu.github.io/dc.js/js/crossfilter.js"></script>
<link rel="stylesheet" href="http://nickqizhu.github.io/dc.js/css/dc.css">
<script src="http://underscorejs.org/underscore-min.js"></script>
<div id="teammateChart"></div>
<div id="teammateChart2"></div>
<div id="teammateChart3"></div>

JavaScript

var chartExample = {
    initChart: function (data) {

        var ndx = crossfilter(data),
            teamMemberDimension = ndx.dimension(function (d) {
                return d.teamMember;
            }),
            teamMemberDimension2 = ndx.dimension(function (d) {
                return d.teamMember;
            }),
            teamMemberChart = dc.rowChart("#teammateChart"),
            teamMemberChart2 = dc.rowChart("#teammateChart2"),
            teamMemberChart3 = dc.rowChart("#teammateChart3"),
            teamMemberGroup = teamMemberDimension.group().reduce(

            function (p, d) {
                if (d.project in p.projects) p.projects[d.project]++;
                else {
                    p.projects[d.project] = 1;
                    p.projectCount++;
                }
                return p;
            },

            function (p, d) {
                p.projects[d.project]--;
                if (p.projects[d.project] === 0) {
                    delete p.projects[d.project];
                    p.projectCount--;
                }
                return p;
            },

            function () {
                return {
                    projectCount: 0,
                    projects: {}
                };
            }), 
            teamMemberGroup2 = teamMemberDimension2.group().reduce(

            function (p, d) {
                if (d.project in p.projects) p.projects[d.project]++;
                else {
                    p.projects[d.project] = 1;
                    p.projectCount++;
                }
                return p;
            },

            function (p, d) {
                p.projects[d.project]--;
                if (p.projects[d.project] === 0) {
                    delete p.projects[d.project];
                    p.projectCount--;
                }
                return p;
            },

            function () {
                return {
                    projectCount: 0,
                   ...