Category Axis

var chart = c3.generate({ data: { columns: [ ['data1', 30, 200, 100, 400, 150, 250, 50, 100, 250] ] }, axis: { x: { type: 'category', categories: ['cat1', 'cat2', 'cat3', 'cat4', 'cat5', 'cat6', 'cat7', 'cat8', 'cat9'] } } });