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sluger
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check data array to fix #39 
1 parent a87b25f commit 240ff25

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‎samples/violinSingle.html‎

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<!doctype html>
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<html>
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<head>
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<title>Violin Chart</title>
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<script src="../node_modules/chart.js/dist/Chart.bundle.js"></script>
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<script src="../build/Chart.BoxPlot.js" type="text/javascript"></script>
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<script src="https://unpkg.com/d3-random@latest/dist/d3-random.js"></script>
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<script src="./utils.js"></script>
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<style>
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canvas {
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-moz-user-select: none;
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-webkit-user-select: none;
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-ms-user-select: none;
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}
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</style>
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</head>
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<body>
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<div id="container" style="width: 75%;">
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<canvas id="canvas"></canvas>
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</div>
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<button id="randomizeData">Randomize Data</button>
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<button id="addDataset">Add Dataset</button>
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<button id="removeDataset">Remove Dataset</button>
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<button id="addData">Add Data</button>
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<button id="removeData">Remove Data</button>
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<script>
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function randomValues(count, min, max) {
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const delta = max - min;
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return Array.from({length: count}).map(() => Math.random() * delta + min);
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}
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const samples = this.Samples.utils;
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var color = Chart.helpers.color;
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var b = d3.randomNormal();
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var random = (min, max) => () => (b() * ((max || 1) - (min || 0))) + (min || 0);
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var boxplotData = {
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labels: samples.months({count: 2}),
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datasets: [{
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label: 'Dataset 1',
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backgroundColor: color(window.chartColors.red).alpha(0.5).rgbString(),
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borderColor: window.chartColors.red,
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borderWidth: 1,
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data: randomValues(1, 0, 100)
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}]
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};
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window.onload = function() {
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var ctx = document.getElementById("canvas").getContext("2d");
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window.myBar = new Chart(ctx, {
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type: 'violin',
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data: boxplotData,
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options: {
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responsive: true,
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legend: {
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position: 'top',
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},
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title: {
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display: true,
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text: 'Chart.js Violin Chart'
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},
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tooltipDecimals: 3
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}
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});
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};
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document.getElementById('randomizeData').addEventListener('click', function() {
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boxplotData.datasets.forEach(function(dataset) {
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dataset.data = samples.boxplots({count: 7});
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});
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window.myBar.update();
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});
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var colorNames = Object.keys(window.chartColors);
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document.getElementById('addDataset').addEventListener('click', function() {
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var colorName = colorNames[boxplotData.datasets.length % colorNames.length];
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var dsColor = window.chartColors[colorName];
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var newDataset = {
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label: 'Dataset ' + boxplotData.datasets.length,
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backgroundColor: color(dsColor).alpha(0.5).rgbString(),
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borderColor: dsColor,
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borderWidth: 1,
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data: samples.boxplotsArray({count: boxplotData.labels.length})
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};
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boxplotData.datasets.push(newDataset);
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window.myBar.update();
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});
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document.getElementById('addData').addEventListener('click', function() {
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if (boxplotData.datasets.length > 0) {
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var month = samples.nextMonth(boxplotData.labels.length);
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boxplotData.labels.push(month);
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for (var index = 0; index < boxplotData.datasets.length; ++index) {
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//window.myBar.addData(randomBoxPlot(), index);
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boxplotData.datasets[index].data.push(samples.numbers({count: 50}));
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}
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window.myBar.update();
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}
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});
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document.getElementById('removeDataset').addEventListener('click', function() {
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boxplotData.datasets.splice(0, 1);
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window.myBar.update();
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});
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document.getElementById('removeData').addEventListener('click', function() {
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boxplotData.labels.splice(-1, 1); // remove the label first
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boxplotData.datasets.forEach(function(dataset, datasetIndex) {
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dataset.data.pop();
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});
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window.myBar.update();
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});
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</script>
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</body>
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</html>

‎src/controllers/violin.js‎

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const data = this.chart.data.datasets[datasetIndex].data[index];
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const violin = asViolinStats(data);
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if ((!Array.isArray(data) && typeof data === 'number' && !Number.isNaN) || violin == null) {
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return {
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min: data,
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max: data,
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median: data,
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coords: [{v: data, estimate: Number.NEGATIVE_INFINITY}],
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maxEstimate: Number.NEGATIVE_INFINITY
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};
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}
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const range = violin.max - violin.min;
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const samples = [];
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const inc = range / points;
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for (let v = violin.min; v <= violin.max; v += inc) {
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for (let v = violin.min; v <= violin.max && inc > 0; v += inc) {
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samples.push(v);
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}
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if (samples[samples.length - 1] !== violin.max) {

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