Displaying Pie Chart Using Chart.JS

Question

I have had success displaying and manipulating bar charts but I cannot figure out how to work the pie charts. When I use the inspect tool I can see that something is there. I am using the following code: Chart.js CDN:

Canvas container for the graph: Javascript taken from the docs:

var ctx = document.getElementById("myChart");       
var myChart = new Chart(ctx,{
    type:"pie",
    data: [3, 4],
    options: {
        animation:{
            animateScale:true
        }
    }
});

Amy advise will be welcomed.

Deep 3015 · Accepted Answer · 2017-04-28 09:04:38Z

2

Try this. For more see Pie chart Usage. Comment if any confusion

var ctx = document.getElementById("myChart").getContext('2d');
var myChart = new Chart(ctx, {
  type: 'pie',
  data: {
    labels: ["Green", "Blue", "Gray", "Purple", "Yellow", "Red", "Black"],
    datasets: [{
      backgroundColor: [
        "#2ecc71",
        "#3498db",
        "#95a5a6",
        "#9b59b6",
        "#f1c40f",
        "#e74c3c",
        "#34495e"
      ],
      data: [12, 19, 3, 17, 28, 24, 7]
    }]
  }
});

.container {
  width: 80%;
  margin: 15px auto;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.5.0/Chart.js"></script>
<div class="container">
  <h2>Chart.js — Pie Chart Demo</h2>
  <div>
    <canvas id="myChart"></canvas>
  </div>
</div>

answered Apr 28, 2017 at 9:04

Deep 3015

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Comments

Mariusz Szurgot · Accepted Answer · 2017-04-28 09:12:44Z

1

According to documentation (Chart.js - Pie & Doughnut Charts), the data variable should have had following structure:

data: {
    labels: ["Green", "Blue", "Gray", "Purple", "Yellow", "Red", "Black"],
    datasets: [{
    backgroundColor: [ /* backgroundColor is optional */
        "#2ecc71",
        "#3498db",
        "#95a5a6",
        "#9b59b6",
        "#f1c40f",
        "#e74c3c",
        "#34495e"
    ], 
    data: [12, 19, 3, 17, 28, 24, 7]
}]

}

as I see it, this is the problem in your case.

edited Apr 28, 2017 at 9:12

answered Apr 28, 2017 at 9:04

Mariusz Szurgot

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