D3.js pie.endAngle() Function

Last Updated : 13 Sep, 2021

The pie.endAngle() function in D3.js is used to set the end angle of the pie. When an angle is specified, it sets the end angle to the given angle or function and returns a pie generator. When the angle is not specified, it returns the current end angle accessor, which defaults to no end angle.

Syntax:

pie.endAngle( angle )

Parameters: This function accepts a single parameter as mentioned above and described below.

angle: It is a number or function that specifies the end angle in radians. It is an optional parameter.

Return Values: This function does not return anything.

Below given are a few examples of pie.endAngle() function in D3.js;

Example 1:

HTML

<!DOCTYPE html>
<html>
 
<head>
    <script src="https://d3js.org/d3.v6.min.js">
    </script>
</head>
 
<body>
    <div style="width:300px; height:300px;">
        <center>
            <h1 style="color:green">
                GeeksforGeeks
            </h1>
            <h2>
                pie.endAngle()
            </h2>
        </center>
        <svg width="300" height="250">
        </svg>
    </div>
     
    <script>
        // Data to be added in the pie chart
        var data = [
            { "property": "p5", "value": 19 },
            { "property": "p5", "value": 12 },
            { "property": "p4", "value": 11 },
            { "property": "p3", "value": 10 },
            { "property": "p2", "value": 9 },
        ]
 
        // Selecting SVG using d3.select()
        var svg = d3.select("svg");
 
        // Creating Pie generator
        var pie = d3.pie()
            .value((d) => { return d.value })
            .startAngle(3)
            // Use of pie.endAngle() Function
            .endAngle(1)
            (data);
        // Creating arc
        var arc = d3.arc()
            .innerRadius(0)
            .outerRadius(80);
 
        let g = svg.append("g")
            .attr("transform", "translate(150,120)");
 
        // Grouping different arcs
        var arcs = g.selectAll("arc")
            .data(pie)
            .enter()
            .append("g");
 
        // Appending path 
        arcs.append("path")
            .attr("fill", (data, i) => {
                return d3.schemeSet3[i];
            })
            .attr("d", arc);
    </script>
</body>
 
</html>

Output:

Example 2:

HTML

<!DOCTYPE html>
<html>
 
<head>
    <script src="https://d3js.org/d3.v6.min.js">
    </script>
</head>
 
<body>
    <div style="width:300px; height:300px;">
        <center>
            <h1 style="color:green">
                GeeksforGeeks
            </h1>
            <h2>
                pie.endAngle()
            </h2>
        </center>
        <svg width="300" height="250">
        </svg>
    </div>
    <script>
        // Data to be added in the pie chart
        var data = [
            { "property": "p5", "value": 19 },
            { "property": "p5", "value": 12 },
            { "property": "p4", "value": 11 },
            { "property": "p3", "value": 10 },
            { "property": "p2", "value": 9 },
            { "property": "p5", "value": 19 },
            { "property": "p5", "value": 12 },
            { "property": "p4", "value": 11 },
            { "property": "p3", "value": 10 },
            { "property": "p2", "value": 9 },
        ]
 
        // Selecting SVG using d3.select()
        var svg = d3.select("svg");
 
        // Creating Pie generator
        var pie = d3.pie()
            .value((d) => { return d.value })
            // Use of pie.endAngle() Function
            .endAngle(4)
            (data);
        // Creating arc
        var arc = d3.arc()
            .innerRadius(10)
            .outerRadius(80);
 
        let g = svg.append("g")
            .attr("transform", "translate(150,120)");
 
        // Grouping different arcs
        var arcs = g.selectAll("arc")
            .data(pie)
            .enter()
            .append("g");
 
        // Appending path 
        arcs.append("path")
            .attr("fill", (data, i) => {
                return d3.schemeSet3[i];
            })
            .attr("d", arc);
    </script>
</body>
 
</html>