<!doctype html>
<html>
<head>
<title>Radar Chart</title>
<script src="../../dist/Chart.bundle.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:40%">
<canvas id="canvas"></canvas>
</div>
<button id="randomizeData">Randomize Data</button>
<button id="addDataset">Add Dataset</button>
<button id="removeDataset">Remove Dataset</button>
<button id="addData">Add Data</button>
<button id="removeData">Remove Data</button>
<script>
var randomScalingFactor = function() {
return Math.round(Math.random() * 100);
};
var color = Chart.helpers.color;
var config = {
type: 'radar',
data: {
labels: [['Eating', 'Dinner'], ['Drinking', 'Water'], 'Sleeping', ['Designing', 'Graphics'], 'Coding', 'Cycling', 'Running'],
datasets: [{
label: 'My First dataset',
backgroundColor: color(window.chartColors.red).alpha(0.2).rgbString(),
borderColor: window.chartColors.red,
pointBackgroundColor: window.chartColors.red,
data: [
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor()
]
}, {
label: 'My Second dataset',
backgroundColor: color(window.chartColors.blue).alpha(0.2).rgbString(),
borderColor: window.chartColors.blue,
pointBackgroundColor: window.chartColors.blue,
data: [
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor(),
randomScalingFactor()
]
}]
},
options: {
legend: {
position: 'top',
},
title: {
display: true,
text: 'Chart.js Radar Chart'
},
scale: {
ticks: {
beginAtZero: true
}
}
}
};
window.onload = function() {
window.myRadar = new Chart(document.getElementById('canvas'), config);
};
document.getElementById('randomizeData').addEventListener('click', function() {
config.data.datasets.forEach(function(dataset) {
dataset.data = dataset.data.map(function() {
return randomScalingFactor();
});
});
window.myRadar.update();
});
var colorNames = Object.keys(window.chartColors);
document.getElementById('addDataset').addEventListener('click', function() {
var colorName = colorNames[config.data.datasets.length % colorNames.length];
var newColor = window.chartColors[colorName];
var newDataset = {
label: 'Dataset ' + config.data.datasets.length,
borderColor: newColor,
backgroundColor: color(newColor).alpha(0.2).rgbString(),
pointBorderColor: newColor,
data: [],
};
for (var index = 0; index < config.data.labels.length; ++index) {
newDataset.data.push(randomScalingFactor());
}
config.data.datasets.push(newDataset);
window.myRadar.update();
});
document.getElementById('addData').addEventListener('click', function() {
if (config.data.datasets.length > 0) {
config.data.labels.push('dataset #' + config.data.labels.length);
config.data.datasets.forEach(function(dataset) {
dataset.data.push(randomScalingFactor());
});
window.myRadar.update();
}
});
document.getElementById('removeDataset').addEventListener('click', function() {
config.data.datasets.splice(0, 1);
window.myRadar.update();
});
document.getElementById('removeData').addEventListener('click', function() {
config.data.labels.pop(); // remove the label first
config.data.datasets.forEach(function(dataset) {
dataset.data.pop();
});
window.myRadar.update();
});
</script>
</body>
</html>
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