The areaRadial.angle() method is used to set or gets the angle accessor. The angle must be a number or a function that returns a number representing an angle in radians.
Syntax:
areaRadial.angle(angle);
Parameters: This method accepts single parameter as mentioned above and described below:
- angle: This parameter holds an angle that can be a number or a function returning the angle ranging (0 to 2Ï€) radians.
Return Value: This method returns the angle accessor of the area radial.
Example 1: The following example sets the angle using this method.
HTML
<!DOCTYPE html> <html> <head>     <meta charset="utf-8">       <script src=     </script> </head>   <body>     <h1 style="text-align: center; color: green;">         neveropen     </h1>       <h3 style="text-align: center;">         D3.js | areaRadial.angle() Method     </h3>       <center>         <svg id="gfg" width="200" height="200">             <g transform="translate(100, 100)"></g>         </svg>     </center>       <script>         var points = [                 {x: 0, y: 0},                 {x: 2, y: 3},                 {x: 4, y: 12},                 {x: 6, y: 8},                 {x: 8, y: 17},                 {x: 10, y: 15},                 {x: 12, y: 20}];           var xScale = d3.scaleLinear()             .domain([0, 6]).range([0, 2 * Math.PI]);         var yScale = d3.scaleLinear()             .domain([0, 20]).range([90, 30]);           var Gen = d3.areaRadial()              // Setting the angle function              .angle(d => xScale(d.x*4))              .innerRadius(d => yScale(d.y/6))              .outerRadius(d => yScale(d.y));           d3.select("#gfg")           .select("g")           .append("path")           .attr("d", Gen(points))           .attr("fill", "green")           .attr("stroke", "black");     </script> </body>   </html> |
Output:
Example 2: The following example demonstrates getting the function for the angle.
HTML
<!DOCTYPE html> <html>   <head>     <meta charset="utf-8">     <script src=     </script> </head>   <body>     <h1 style="text-align: center; color: green;">         neveropen     </h1>       <h3 style="text-align: center;">         D3.js | areaRadial.angle() Method     </h3>       <center>         <svg id="gfg" width="200" height="200">             <g transform="translate(100, 100)"></g>         </svg>     </center>       <script>         var points = [                 {x: 0, y: 0},                 {x: 2, y: 3},                 {x: 4, y: 12},                 {x: 6, y: 8},                 {x: 8, y: 17},                 {x: 10, y: 15},                 {x: 12, y: 20}];           var xScale = d3.scaleLinear()             .domain([0, 6]).range([0, 2 * Math.PI]);         var yScale = d3.scaleLinear()             .domain([0, 20]).range([90, 30]);           var Gen = d3.areaRadial()              // Setting the angle function              .angle(d => xScale(d.x*4))              .innerRadius(d => yScale(d.y/6))              .outerRadius(d => yScale(d.y));           d3.select("#gfg")           .select("g")           .append("path")           .attr("d", Gen(points))           .attr("fill", "green")           .attr("stroke", "black");           console.log(Gen.angle);         console.log(Gen.angle());     </script> </body> </html> |
Output:
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