d3.js log.rangeRound()用法及代码示例

log.rangeRound()函数用于将刻度范围设置为指定的值数组，并在内部将内插器设置为interpolatorRound。

用法:

log.rangeRound([range]);

参数：该函数采用上面给出并在下面描述的单个参数。

[范围]：包含指定域范围的数组。

返回值：此函数不返回任何值。

范例1：

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8" /> 
    <meta name="viewport" path1tent= 
        "width=device-width,initial-scale=1.0" /> 
    <script src="https://d3js.org/d3.v4.min.js"> 
    </script> 
</head> 
  
<body> 
    <h2 style="color:green">GeekforGeeks</h2> 
  
    <p>log.rangeRound() Function</p> 
  
    <script> 
        var log = d3.scaleLog() 
            // Domain 
            .domain([1, 10]) 
  
            // Range for the domain 
            .rangeRound([10, 20, 30, 40, 50, 60, 70, 80, 90]); 
              
        document.write("<h3>log(1.0):" + log(1.0) + "</h3>"); 
        document.write("<h3>log(2.5):" + log(2.5) + "</h3>"); 
        document.write("<h3>log(4):" + log(4) + "</h3>"); 
        document.write("<h3>log(4.5):" + log(4.5) + "</h3>"); 
        document.write("<h3>log(1.5):" + log(1.5) + "</h3>"); 
    </script> 
</body> 
  
</html>

输出：

范例2：

HTML

<!DOCTYPE html> 
<html lang="en"> 
  
<head> 
    <meta charset="UTF-8" /> 
    <meta name="viewport" path1tent="width=device-width,  
                   initial-scale=1.0" /> 
    <script src="https://d3js.org/d3.v4.min.js"> 
    </script> 
</head> 
  
<body> 
    <h2 style="color:green">GeekforGeeks</h2> 
  
    <p>log.rangeRound() Function</p> 
  
    <script> 
        var log = d3.scaleLog() 
            // Domain 
            .domain([1, 10]) 
            // Range for the domain 
            .rangeRound([0, 960]); 
  
        document.write("<br/><div style=float:left;>"); 
        document.write("<p> With rangeRound()</p>"); 
        document.write("<h3>" + log(1.5) + "</h3>"); 
        document.write("<h3>" + log(2.5) + "</h3>"); 
        document.write("<h3>" + log(3.5) + "</h3>"); 
        document.write("<h3>" + log(4.5) + "</h3>"); 
        document.write("<h3>" + log(8.5) + "</h3>"); 
        document.write( 
            "<h3>" + log(10.5) + "</h3></div>"); 
  
        var log = d3.scaleLog() 
            // Domain 
            .domain([1, 10]) 
            // Range for the domain 
            .range([0, 960]); 
  
        document.write( 
          "<div style=margin-left:10px;float:left;>"); 
        document.write("<p> Without rangeRound()</p>"); 
        document.write("<h3>" + log(1.5) + "</h3>"); 
        document.write("<h3>" + log(2.5) + "</h3>"); 
        document.write("<h3>" + log(3.5) + "</h3>"); 
        document.write("<h3>" + log(4.5) + "</h3>"); 
        document.write("<h3>" + log(8.5) + "</h3>"); 
        document.write( 
            "<h3>" + log(10.5) + "</h3></div>"); 
    </script> 
</body> 
  
</html>

输出：

相关用法

注：本文由纯净天空筛选整理自tarun007大神的英文原创作品 D3.js log.rangeRound() Function。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。