C3.js | D3-based reusable chart library
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Y Axis Tick Format
# axes_y_tick_format.js
var chart = c3.generate({ data: { columns: [ ['sample', 30, 200, 100, 400, 150, 2500] ] }, axis : { y : { tick: { format: d3.format("$,") // format: function (d) { return "$" + d; } } } } });