d3.js band.range()用法及代碼示例

D3.js庫中的band.range()函數用於將刻度範圍設置為指定的兩元素數字數組。範圍的默認值為[0，1]。

用法:

  band.range([range]);

參數：該函數接受上麵給定和下麵描述的單個參數。

range:此參數接受一個包含兩個元素的數字數組。

注意：如果範圍中的元素不是數字，則將其強製為數字。

返回值：此函數不返回任何內容。

下麵給出的是上麵給出的函數的一些例子。

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> 
        // Create the band scale with specified 
        // domain and range. 
        var band = d3.scaleBand() 
            .domain([0, 1]) 
            .range([0, 1]); 
  
        console.log("When range is [0, 1]"); 
        console.log("band(0):", band(0)); 
        console.log("band(1):", band(1)); 
  
        var band = d3.scaleBand() 
            .domain([0, 1]) 
            .range([10, 20]); 
  
        console.log("When range is [10, 20]"); 
        console.log("band(0):", band(0)); 
        console.log("band(1):", band(1)); 
    </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> 
        // Create the band scale with specified  
        // domain and range. 
        var band = d3.scaleBand() 
            .domain([0, 1]) 
            // These chars are coerced to numbers 
            .range(["1", "2"]); 
  
        console.log("When range is [\"1\", \"2\"]"); 
        console.log("band(0):", band(0)); 
        console.log("band(1):", band(1)); 
  
        var band = d3.scaleBand() 
            .domain([0, 1]) 
            // These chars are coerced to numbers 
            .range(["100", "200"]); 
  
        console.log("When range is [\"100\", \"200\"]"); 
        console.log("band(0):", band(0)); 
        console.log("band(1):", band(1)); 
    </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 band.range() 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。