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dhtmlxchart
Grouping

## Example (Grouping)

    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <html>
    <head>
    	<title>Chart</title>

    	<script src="../../codebase/dhtmlxchart.js" type="text/javascript"></script>
    	<link rel="STYLESHEET" type="text/css" href="../../codebase/dhtmlxchart.css">

    	<style>
    		.dhx_chart_title{
    			padding-left:3px
    		}
    	</style>
    </head>
    <body>
    	<h1>Chart</h1>

    	<div id="chart_container" style="width:500px;height:300px;border:1px solid #A4BED4;"></div>

    	<script>
    	var barChart =  new dhtmlXChart({
    		view:"bar",
    		container:"chart_container",
    	    value:"#sales#",
    		label:"#id#",
    		sort:{
    			by:"#id#",
    			as:"string",
    			dir:"asc"
    		},
    		group:{
    			by:"#year#",
    			map:{
    				sales:["#sales#","sum"]
    			}
    		}
    	})
    	barChart.load("../common/stat.xml");

    	function  groupA(){
    		barChart.group({
    			by:"#company#",
    			map:{
    				sales:["#sales#","sum"]
    			}
    		});
    	}

    	function  groupB(){
    		barChart.group({
    			by:"#year#",
    			map:{
    				sales:["#sales#","sum"]
    			}
    		});
    	}

    	function  groupC(){
    		barChart.group({
    			by:"#year#",
    			map:{
    				sales:["#sales#","max"]
    			}
    		});
    	}
    	function sort_asc(){
    		barChart.define("sort",{
    			by:"#id#",
    			dir:"asc"
    		});
    		barChart.render();
    	}
    	function sort_dsc(){
    		barChart.define("sort",{
    			by:"#id#",
    			dir:"dsc"
    		});
    		barChart.render();
    	}
    	</script>
    	<input type="button" name="some_name" value="group by Company" onclick="groupA();">
    	<input type="button" name="some_name" value="group by Year (total sales)" onclick="groupB();">
    	<input type="button" name="some_name" value="group by Year (max sales)" onclick="groupC();">
    	<br/>
    	<input type="button" name="some_name" value="sort Asc" onclick="sort_asc();">
    	<input type="button" name="some_name" value="sort Desc" onclick="sort_dsc();">

    </body>
    </html>