Tooltip Grouping

var chart = c3.generate({ data: { columns: [ ['data1', 30, 200, 100, 400, 150, 250], ['data2', 50, 20, 10, 40, 15, 25], ['data3', 500, 320, 210, 340, 215, 125] ] }, tooltip: { grouped: false // Default true } });