<html> <head> <link href="/css/c3.css" rel="stylesheet" type="text/css"> </head> <body> <div id="chart"></div> <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> <script src="/js/c3.js"></script> <script> var chart = c3.generate({ data: { columns: [ ['data1', 300, 350, 300, 0, 0, 0], // ['data2', 130, 100, 140, 200, 150, 50] ], types: { data1: 'step', data2: 'area-step' } }, subchart: { show: true }, }); setTimeout(function () { chart.load({ columns: [ ['data2', 130, 100, 140, 200, 150, 50] ] }); }, 1000); </script> </body> </html>