d3.js log.domain()用法及代碼示例

log.domain()函數用於將秤的域設置為指定的數字數組。此處指定的數組必須包含兩個或兩個以上元素。默認情況下，域為[1,10]。

用法:

log.domain([domain]);

參數：該函數接受如上所述和以下描述的單個參數。

[域]：這是一個采用兩個或多個指定域的值的數組。

返回值：此函數不返回任何值。

以下示例說明了D3.js中的log.domain()函數：

範例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>

輸出：

範例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>

輸出：

相關用法

注：本文由純淨天空篩選整理自tarun007大神的英文原創作品 D3.js log.domain() Function。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。