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<!doctype html>
<html>
<head>
<title>Line Chart - Cubic interpolation mode</title>
<script src="../../../dist/Chart.min.js"></script>
<script src="../../utils.js"></script>
<style>
canvas{
-moz-user-select: none;
-webkit-user-select: none;
-ms-user-select: none;
}
</style>
</head>
<body>
<div style="width:75%;">
<canvas id="canvas"></canvas>
</div>
<br>
<br>
<button id="randomizeData">Randomize Data</button>
<script>
var randomScalingFactor = function() {
return Math.round(Math.random() * 100);
};
var datapoints = [0, 20, 20, 60, 60, 120, NaN, 180, 120, 125, 105, 110, 170];
var config = {
type: 'line',
data: {
labels: ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12'],
datasets: [{
label: 'Cubic interpolation (monotone)',
data: datapoints,
borderColor: window.chartColors.red,
backgroundColor: 'rgba(0, 0, 0, 0)',
fill: false,
cubicInterpolationMode: 'monotone'
}, {
label: 'Cubic interpolation (default)',
data: datapoints,
borderColor: window.chartColors.blue,
backgroundColor: 'rgba(0, 0, 0, 0)',
fill: false,
}, {
label: 'Linear interpolation',
data: datapoints,
borderColor: window.chartColors.green,
backgroundColor: 'rgba(0, 0, 0, 0)',
fill: false,
lineTension: 0
}]
},
options: {
responsive: true,
title: {
display: true,
text: 'Chart.js Line Chart - Cubic interpolation mode'
},
tooltips: {
mode: 'index'
},
scales: {
xAxes: [{
display: true,
scaleLabel: {
display: true
}
}],
yAxes: [{
display: true,
scaleLabel: {
display: true,
labelString: 'Value'
},
ticks: {
suggestedMin: -10,
suggestedMax: 200,
}
}]
}
}
};
window.onload = function() {
var ctx = document.getElementById('canvas').getContext('2d');
window.myLine = new Chart(ctx, config);
};
document.getElementById('randomizeData').addEventListener('click', function() {
for (var i = 0, len = datapoints.length; i < len; ++i) {
datapoints[i] = Math.random() < 0.05 ? NaN : randomScalingFactor();
}
window.myLine.update();
});
</script>
</body>
</html>