d3.js log.domain()用法及代码示例

log.domain()函数用于将秤的域设置为指定的数字数组。此处指定的数组必须包含两个或两个以上元素。默认情况下，域为[1,10]。

用法:

log.domain([domain]);

参数：该函数接受如上所述和以下描述的单个参数。

[域]：这是一个采用两个或多个指定域的值的数组。

返回值：此函数不返回任何值。

以下示例说明了D3.js中的log.domain()函数：

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> 
    <script> 
        var log = d3.scaleLog() 
          
            // Setting domain for the scale. 
            // Domain can not be less than one. 
            .domain([1, 20]) 
            .range(["1", "2", "3", "4", "5"]); 
        console.log("The domain of this is [1,20]:"); 
        console.log("log(0):" + log(0)); 
        console.log("log(1):" + log(1)); 
        console.log("log(2):" + log(2)); 
    </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> 
    <script> 
        var log = d3.scaleLog() 
          
            // Setting domain for the scale. 
            .domain([-1, +1]) 
            .range(["1", "2", "3", "4", "5"]); 
        console.log("When domain is less than one."); 
        console.log("The domain of this is [-1,+1]:"); 
        console.log("log(0):" + log(0)); 
        console.log("log(1):" + log(1)); 
        console.log("log(0.5):" + log(0.5)); 
    </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.domain() 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。