D3.js areaRadial.outerRadius() 方法

areaRadial.outerRadius()方法用于设置或返回areaRadial的外半径访问器。它可以是一个数字，也可以是一个函数，它返回一个代表我们 areaRadial 的外半径的数字。

句法：

areaRadial.outerRadius(outer_Rad);

参数：此方法接受上面提到的单个参数，如下所述：

• outer_Rad：此参数保存的外半径可以是数字或返回外半径的函数。

返回值：该方法返回区域radial的outerRadius访问器函数。

示例 1：

HTML

    
  
    
    

  

    
        GeeksforGeeks
    
  
    
        D3.js | areaRadial.outerRadius() Method
    
  
    
        
            
        
    
  
    
        var points = [
                {x: 0, y: 0},
                {x: 2, y: 3},
                {x: 4, y: 1},
                {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()
             .angle(d => xScale(d.x))
             .innerRadius(d => yScale(d.y)/2)
             // Setting outerRadius
             .outerRadius(d => yScale(d.y));
  
        d3.select("#gfg")
          .select("g")
          .append("path")
          .attr("d", Gen(points))
          .attr("fill", "green")
          .attr("stroke", "black");
  
    

  

输出：

示例 2：

HTML

    
    
    

  

    
        GeeksforGeeks
    
  
    
        D3.js | areaRadial.outerRadius() Method
    
  
    
        
            
        
    
  
    
        var data = [
          {x: 10, y: 1},
          {x: 15, y: 3},
          {x: 20, y: 5},
          {x: 25, y: 7},
          {x: 30, y: 9},
          {x: 35, y: 11},
          {x: 40, y: 13}];
  
        var xScale = d3.scaleLinear()
            .domain([0, 8]).range([25, 200]);
        var yScale = d3.scaleLinear()
            .domain([0, 20]).range([200, 25]);
  
        var Gen = d3.areaRadial()
             .angle(d => xScale(d.x/3))
             .innerRadius(d => yScale(d.y/2))
  
             // Setting outerRadius
             .outerRadius(d => yScale(d.y));
  
        d3.select("#gfg")
          .select("g")
          .append("path")
          .attr("d", Gen(data))
          .attr("fill", "green")
          .attr("stroke", "black");
    

  

输出：