Row grouping

{
	"rowGroup": {
		"dataSrc": 0,
		"endRender": "function ( rows, group ) { return code_manager_row_grouping_demo(rows, group) }"
	}
}

function code_manager_row_grouping_demo(rows, group) {
	var avgInStock = rows.data().pluck(4).reduce( function (a, b) { return parseFloat(a) + parseFloat(b); } ) / rows.count();
	
	var avgPrice = rows.data().pluck(5).reduce( function (a, b) { return parseFloat(a) + parseFloat(b); } ) / rows.count();
	avgPrice = jQuery.fn.dataTable.render.number('.', ',', 2, '$').display( avgPrice );
	
	var avgRetailPrice = rows.data().pluck(6).reduce( function (a, b) { return parseFloat(a) + parseFloat(b); } ) / rows.count();
	avgRetailPrice = jQuery.fn.dataTable.render.number('.', ',', 2, '$').display( avgRetailPrice );
	
	//return "Average for " + group + ": " + Math.floor(avgInStock) + " : " + avgPrice + " : " + avgRetailPrice;
	return jQuery('<tr/>')
		.append('<td colspan="4">Averages for '+group+'</td>' )
		.append('<td class="quantityInStock">'+Math.floor(avgInStock)+'</td>')
		.append('<td class="buyPrice">'+avgPrice+'</td>')
		.append('<td class="MSRP">'+avgRetailPrice+'</td>');
}