D3.js curveMonotoneX() 方法

d3.curveMonotoneX插值器假定数据是根据 x 坐标排序的，否则对数据进行相应的排序。假设 x 具有单调性，此曲线方法生成保持 y 单调性的三次样条。

句法：

d3.curveMonotoneX()

参数：此方法不接受任何参数。

返回值：此方法不返回任何值。

示例 1：

  

    
    
    

  

    
        GeeksforGeeks
    
  
    
        
    
  
    
        var data = [
          {x: 0, y: 0},
          {x: 1, y: 3},
          {x: 2, y: 15},
          {x: 5, y: 1},
          {x: 6, y: 15},
          {x: 7, y: 5},
          {x: 8, y: 19}];
  
        var xScale = d3.scaleLinear()
          .domain([0, 8]).range([25, 200]);
        var yScale = d3.scaleLinear()
          .domain([0, 20]).range([200, 25]);
  
        var line = d3.line()
          .x((d) => xScale(d.x))
          .y((d) => yScale(d.y))
          .curve(d3.curveMonotoneX);
  
        d3.select("#gfg")
          .append("path")
          .attr("d", line(data))
          .attr("fill", "none")
          .attr("stroke", "green");
    

输出：

示例 2：将未排序的点按 x 轴排序，然后渲染曲线。

  

    
    
    

  

    
        GeeksforGeeks
    
  
    
        
    
  
    
        var points = [
          {xpoint: 75,  ypoint: 150},
          {xpoint: 25,  ypoint: 5},
          {xpoint: 150, ypoint: 115},
          {xpoint: 100, ypoint: 5},
          {xpoint: 200, ypoint: 150}];
  
        // Sorting the points by x axis
        points.sort((a, b) => a.xpoint - b.xpoint);
  
        var Gen = d3.line()
          .x((p) => p.xpoint)
          .y((p) => p.ypoint)
          .curve(d3.curveMonotoneX);
  
        d3.select("#gfg")
          .append("path")
          .attr("d", Gen(points))
          .attr("fill", "none")
          .attr("stroke", "green");
  
    

输出：