[SOLVED] How to create Pie chart using Plottable.js

How to create Pie chart using Plottable.js

I tried to create a pie chart using Plottable.js. Does anyone know how? I get confused on how to pass the value and put a label in.

Here is my sample data:

var store = [{ Name:"Item 1", Total:18 },
             { Name:"Item 2", Total:7 },
             { Name:"Item 3", Total:3},
             { Name:"Item 4", Total:12}];

Thanks again!

Solution

You can specify the value of each slice with Pie.sectorValue and you can turn on the label with Pie.labelsEnabled which shows the corresponding value for each sector. You can also format the labels with Pie.labelFormatter

However, I don't think there is a way to show data other than the sector value as the label, but depending on what you want, a legend might work

Here's an example of Pie chart with Legend:

window.onload = function(){
  var store = [{ Name:"Item 1", Total:18 },
               { Name:"Item 2", Total:7 },
               { Name:"Item 3", Total:3},
               { Name:"Item 4", Total:12}];
  

  var colorScale = new Plottable.Scales.Color();
  var legend = new Plottable.Components.Legend(colorScale);

  var pie = new Plottable.Plots.Pie()
  .attr("fill", function(d){ return d.Name; }, colorScale)
  .addDataset(new Plottable.Dataset(store))
  .sectorValue(function(d){ return d.Total; } )
  .labelsEnabled(true)
  .labelFormatter(function(n){ return "$ " + n ;});
    
  new Plottable.Components.Table([[pie, legend]]).renderTo("#chart");
    
     
}

<link href="https://rawgithub.com/palantir/plottable/develop/plottable.css" rel="stylesheet"/>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://rawgithub.com/palantir/plottable/develop/plottable.js"></script>
<div id="container">
  <svg id="chart" width="350" height="350"></svg>
</div>

Or, if all the values are unique, then you can probably hack it with labelFormatter

window.onload = function(){
  var store = [{ Name:"Item 1", Total:18 },
               { Name:"Item 2", Total:7 },
               { Name:"Item 3", Total:3},
               { Name:"Item 4", Total:12}];
  var reverseMap = {};
  store.forEach(function(s) { reverseMap[s.Total] = s.Name;});
    
  var ds = new Plottable.Dataset(store);  
  

  var pie = new Plottable.Plots.Pie()
  .addDataset(ds)
  .sectorValue(function(d){ return d.Total; } )
  .labelsEnabled(true)
  .labelFormatter(function(n){ return reverseMap[n] ;})
  .renderTo("#chart");
}

<link href="https://rawgithub.com/palantir/plottable/develop/plottable.css" rel="stylesheet"/>
<script src="http://d3js.org/d3.v3.min.js"></script>
<script src="http://rawgithub.com/palantir/plottable/develop/plottable.js"></script>
<div id="container">
  <svg id="chart" width="350" height="350"></svg>
</div>