d3.js scaleSequential()用法及代碼示例

順序刻度與連續刻度非常相似。在連續規模上，域和範圍之間的映射是連續進行的。唯一的區別是此標度的輸出範圍由其內插器固定，並且該範圍無法更改。

d3.scaleSequential()函數用於創建和返回順序刻度。此比例尺具有指定的範圍和固定範圍。

用法:

d3.scaleSequential([[domain, ]interpolator]);

參數：above-given函數接受上述和以下所述的兩個參數。

domain:這是最大和最小輸入值範圍。默認域為[0，1]。
interpolator:這需要一個內插器函數。如果未指定，則默認為身份函數。

返回值：該函數返回一個函數。

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>  
    <h2 style="color:green">GeeksforGeeks</h2> 
  
    <h4>d3.scaleSequential() Function</h4> 
  
    <script>  
        var sequential= d3.scaleSequential( 
            function(t) { 
                return d3.rgb(t * 400, 1.5, 0.8); 
            } 
        ) 
  
        document.write("<p>sequential(0.1):", 
                sequential(0.1) + "</p>"); 
  
        document.write("<p>sequential(0.2):", 
                sequential(0.2) + "</p>"); 
          
        document.write("<p>sequential(0.3):", 
                sequential(0.3) + "</p>"); 
          
        document.write("<p>sequential(0.4):", 
                sequential(0.4) + "</p>"); 
          
        document.write("<p>sequential(0.5):", 
                sequential(0.5) + "</p>"); 
          
        document.write("<p>sequential(0.6):", 
                sequential(0.6) + "</p>"); 
    </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>  
    <h2 style="color:green">GeeksforGeeks</h2> 
  
    <h4>d3.scaleSequential() Function</h4> 
  
    <script>  
        var sequential= d3.scaleSequential( 
            function(t) { 
                return d3.interpolateNumber(t * 400, 0, 10); 
            } 
        ) 
  
        document.write("<p>sequential(0.1)(-1):", 
                    sequential(0.1)(-1) + "</p>"); 
  
        document.write("<p>sequential(0.1)(1):", 
                    sequential(0.1)(1) + "</p>"); 
  
        document.write("<p>sequential(0.1)(0):", 
                    sequential(0.1)(0) + "</p>"); 
  
        document.write("<p>sequential(0.1)(0.5):", 
                    sequential(0.1)(0.5) + "</p>"); 
    </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 scaleSequential() 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。