# axes_x_tick_format.js
var chart = c3.generate({
data: {
x: 'x',
columns: [
['x', '2010-01-01', '2011-01-01', '2012-01-01', '2013-01-01', '2014-01-01', '2015-01-01'],
['sample', 30, 200, 100, 400, 150, 250]
]
},
axis : {
x : {
type : 'timeseries',
tick: {
format: function (x) { return x.getFullYear(); }
//format: '%Y' // format string is also available for timeseries data
}
}
}
});