D3.js quantile.copy()函数

quantile.copy()函数返回原始比例的精确副本。如果在任何一个比例尺中进行任何更改，都不会影响另一个比例尺。

句法：

quantile.copy();

参数：此函数不接受任何参数。

返回值：此函数返回原始比例的副本。

下面的示例说明了 D3.js 中的 quantile.copy()函数：

示例 1：

HTML

  

    
    
  
    
    

  

    GeekforGeeks
  
    quantile.copy() Function
  
    
        var quantile = d3.scaleQuantile()
            // Setting domain for the scale.
            .domain([1, 2, 15, 19])
            // Discrete range
            .range(["red", "green", "black", "blue"]);
        // Printing the output.
        document.write("<h3>Form original scale: </h3>");
  
        document.write("<span>quantile(1): " 
                + quantile(1) + "</span><br>");
        document.write("<span>quantile(15): " 
                + quantile(15) + "</span><br>");
        document.write("<h3>Form copy scale: </h3>");
        var copyscale = quantile.copy();
        document.write("<span>copyscale(1): " 
                + copyscale(1) + "</span><br>");
        document.write("<span>copyscale(15): "
                + copyscale(15) + "</span><br>");
    

  

输出：

示例 2：

HTML

  

    
    
  
    
    

  

    GeekforGeeks
  
    quantile.copy() Function 
  
    
        var quantile = d3.scaleQuantile()
            // Setting domain for the scale.
            .domain([1, 2, 15, 19])
            // Discrete range
            .range(["red", "green", "black", "blue"]);
  
        // Printing the output.
        document.write("<h3>Form original scale: </h3>");
        document.write("<span>quantile(2): " 
                + quantile(2) + "</span><br>");
        document.write("<span>quantile(19): " 
                + quantile(19) + "</span><br>");
        document.write("<h3>Form copy scale: </h3>");
        // Changing th copy scale. 
        var copyscale = quantile.copy()
            .range([1.22, 11.5421, 2.2154, 3.2154]);
        document.write("<span>copyscale(2): " 
                + copyscale(2) + "</span><br>");
        document.write("<span>copyscale(19): " 
                + copyscale(19) + "</span><br>");
    

  

输出：