D3.js Ribbon.source()函数

D3.js中的ribbon.source()函数用于将源访问器设置为指定函数并返回此功能区生成器。

句法：

ribbon.source();

参数：此函数接受如上所述和如下所述的单个参数

• source：此参数是设置源访问器的函数。

返回值：此函数返回功能区生成器。

下面的程序说明了D3.js中的ribbon.source()函数

示例 1：

HTML

 
  
 
  
  
  
 

   
    GeeksForGeeks  
    D3.js | ribbon.source() Function
    
    
      // Create the svg area
      var svg = d3.select("#GFG")
          .append("svg")
          .attr("width", 300)
          .attr("height", 300)
          .append("g")
          .attr("transform", "translate(150,150)");
  
      // Create input data
      var data = [[148, 60, 71, 34, 5, 1],
                  [ 10, 80, 80, 12, 34, 53],
                  [175, 16, 68, 0 , 0, 3],
                  [13, 9, 69, 76, 35, 4],
                  [51, 60, 71, 34, 5, 1]];
  
      // Give this matrix to d3.chord()
      var chords = d3.chord()(data);
  
      var ribbon = d3.ribbon().radius(140);  
  
      // Use of ribbon.source() function
      ribbon({
        source: {startAngle: 0.7524114, 
                   endAngle: 1.1212972},
        target: {startAngle: 1.8617078, 
                   endAngle: 1.9842927}
      });
  
      svg.datum(chords)
          .append("g")
          .selectAll("path")
          .data(function (d) { return d; })
          .enter()
          .append("path")
          .attr("d", ribbon)
          .style("fill", "#4feb34")
          .style("stroke", "black");
     
  
 

输出：

示例 2：

HTML

 
  
 
  
  
  
  
  
 
 
   
    GeeksForGeeks 
    D3.js | ribbon.source() Function
    
    
      // Create the svg area
      var svg = d3.select("#GFG")
          .append("svg")
          .attr("width", 320)
          .attr("height", 320)
          .append("g")
          .attr("transform", "translate(160,160)");
  
      // Create input data
      var data = [[ 0, 58, 71, 89, 16, 28, 68],
                  [ 19, 51, 0, 20, 60, 61, 71],
                  [ 80, 10, 16, 145, 0, 80, 45],
                  [ 10, 13,  9, 90,  94, 0, 0],
                  [ 80, 10, 16, 145, 0, 80, 45],
                  [ 10, 13,  9, 90,  94, 0, 0]];
  
      // 4 groups, so create a vector of 4 colors
      var colors = [d3.schemeSet2[0], d3.schemeSet2[1],
                    d3.schemeSet2[2], d3.schemeSet2[3],
                    d3.schemeSet2[4], d3.schemeSet2[5],
                    d3.schemeSet2[6], d3.schemeSet2[7]];
  
      // Give this matrix to d3.chord()
      var chords = d3.chord()
          .padAngle(0.175)
          .sortSubgroups(d3.ascending)
          (data);
  
      var rib = d3.ribbon().radius(150);
  
      // Use of ribbon.source() function
      rib({
        source: {startAngle: 0.7, endAngle: 1.2},
        target: {startAngle: 1.6, endAngle: 1.9}
      });
      svg.datum(chords)
          .append("g")
          .selectAll("path")
          .data(function (d) { return d; })
          .enter()
          .append("path")
          .attr("d", rib)
          .style("fill", function (d) { 
              return (colors[d.source.index])
          })
          .style("stroke", "black");
     
  

输出：