google.charts.load('current', {
callback: drawTable,
packages: ['table']
});
function drawTable() {
var data = new google.visualization.DataTable();
data.addColumn('string', 'Date');
data.addColumn('string', 'Project');
data.addColumn('string', 'System');
data.addColumn('number', 'No');
data.addRows([ ['7/31/2014', 'project1', 'system1', 5], ['5/2/2014', 'project2', 'system2', 2], ['5/2/2014', 'project1', 'system1', 5], ['5/2/2014', 'project4', 'system4', 4], ['5/2/2014', 'project3', 'system4', 5], ['1/31/2014', 'project3', 'system4', 1], ['1/31/2014', 'project4', 'system4', 2] ]);
var view = new google.visualization.DataView(data);
var id = document.getElementById('table_div');
var table = new google.visualization.Table(id);
google.visualization.events.addOneTimeListener(table, 'ready', function () {
var rowLabel = null;
var rowIndex;
var rowSpan;
var rows = id.getElementsByTagName('tr');
Array.prototype.forEach.call(rows, function (row, index) {
if (rowLabel !== row.cells[0].innerHTML) {
rowLabel = row.cells[0].innerHTML;
rowIndex = index;
if (rowSpan > 1) {
rows[index - rowSpan].cells[0].rowSpan = rowSpan;
}
rowSpan = 1;
} else {
row.removeChild(row.cells[0]);
if (index === (rows.length - 1)) {
rows[index - rowSpan].cells[0].rowSpan = ++rowSpan;
} else {
rowSpan++;
}
}
});
});
table.draw(view, {
allowHtml: true,
width: '100%',
height: '100%',
page: 'enable',
pageSize: 10
});
}
<script src="https://www.gstatic.com/charts/loader.js"></script>
<div id="table_div"></div>