How to add labels to c3.js scatter plot graph?

Question

Is it possible to add labels to scatter plot points in c3.js like in this google charts example?

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https://google-developers.appspot.com/chart/interactive/docs/gallery/bubblechart#javascript

Answer 1

c3 doesn't support this currently - https://github.com/masayuki0812/c3/issues/481. But you can easily add the functionality - just loop through the chart series and points and add the labels as necessary.

var labels = [
    ['AA', 'BB', 'CC', 'DD', 'EE', 'FF', 'GG', 'HH'],
    ['ZA', 'ZB', 'ZC', 'ZD', 'ZE', 'ZF', 'ZG', 'ZH']
];
// series
var series = chart.internal.main
                .selectAll('.' + c3.chart.internal.fn.CLASS.circles)[0];
// text layers
var texts = chart.internal.main
                .selectAll('.' + c3.chart.internal.fn.CLASS.chartTexts)
                .selectAll('.' + c3.chart.internal.fn.CLASS.chartText)[0]
series.forEach(function (series, i) {
    var points = d3.select(series).selectAll('.' + c3.chart.internal.fn.CLASS.circle)[0]
    points.forEach(function (point, j) {
        d3.select(texts[i])
            .append('text')
            .attr('text-anchor', 'middle')
            .attr('dy', '0.3em')
            .attr('x', d3.select(point).attr('cx'))
            .attr('y', d3.select(point).attr('cy'))
            .text(labels[i][j])
    })
});

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Fiddle - http://jsfiddle.net/6phuuans/

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