The d3.chord() function in D3.js is used to return a constructed new chord layout with the default settings.
Syntax:
d3.chord()
Parameters: This function does not accept any parameters.
Return Value: This function returns the constructed new chord layout.
Below programs illustrate the d3.chord() function in D3.js:
Example 1:
HTML
<!DOCTYPE html> <html> <head> <script src= </script> </head> <body> <center> <h1 style="color:green;">GeeksForGeeks</h1> <h3>D3.js | d3.chord() Function</h3> <div id="GFG"></div> <script> // Create the svg area var svg = d3.select("#GFG") .append("svg") .attr("width", 340) .attr("height", 340) .append("g") .attr("transform", "translate(170,170)") // Create input data var data = [[8010, 16145, 8090, 8045], [1013, 990, 940, 6907], [11975, 5871, 8916, 2868], [1951, 10048, 2060, 6171]]; // Give this matrix to d3.chord() var chords = d3.chord() .padAngle(0.05) (data) // Add the groups on the inner part // of the circle svg.datum(chords) .append("g") .selectAll("g") .data(function (d) { return d.groups; }) .enter() .append("g") .append("path") .style("fill", "black") .style("stroke", "black") .attr("d", d3.arc() .innerRadius(150) .outerRadius(160) ) // Add the links between groups svg.datum(chords) .append("g") .selectAll("path") .data(function (d) { return d; }) .enter() .append("path") .attr("d", d3.ribbon() .radius(150) ) .style("fill", "#32a852") .style("stroke", "black"); </script> </center> </body> </html> |
Output:
Example 2:
HTML
<!DOCTYPE html> <html> <head> <script src= </script> <script src= </script> <script src= </script> <script src= </script> </head> <body> <center> <h1 style="color:green;">GeeksForGeeks</h1> <h3>D3.js | d3.chord() Function</h3> <div id="GFG"></div> <script> // Create the svg area var svg = d3.select("#GFG") .append("svg") .attr("width", 340) .attr("height", 340) .append("g") .attr("transform", "translate(170,170)") // Create input data var data = [[0, 5871, 8916, 2868], [1951, 0, 2060, 6171], [8010, 16145, 0, 8045], [1013, 990, 940, 0]]; // 4 groups, so create a vector of 4 colors var colors = [d3.schemeDark2[0], d3.schemeDark2[1], d3.schemeDark2[2], d3.schemeDark2[3]]; // Give this matrix to d3.chord() var chords = d3.chord() .padAngle(0.175) .sortSubgroups(d3.ascending) (data) // Add the groups on the inner part // of the circle svg.datum(chords) .append("g") .selectAll("g") .data(function (d) { return d.groups; }) .enter() .append("g") .append("path") .style("fill", function (d, i) { return colors[i] }) .style("stroke", "black") .attr("d", d3.arc() .innerRadius(150) .outerRadius(160) ) // Add the links between groups svg.datum(chords) .append("g") .selectAll("path") .data(function (d) { return d; }) .enter() .append("path") .attr("d", d3.ribbon() .radius(150) ) .style("fill", function (d) { return (colors[d.source.index]) }) .style("stroke", "black"); </script> </center> </body> </html> |
Output:
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