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: