d3.js continuous.range()用法及代碼示例

d3.js中的Continuous.range()函數用於將刻度範圍設置為必須包含兩個或兩個以上值的指定值數組。範圍內的元素可以是數字或字符串。

用法:

continuous.range([range]);

參數：該函數接受如上所述和以下描述的單個參數。

[範圍]：這是一個包含指定域範圍的數組。

返回值：此函數不返回任何內容。

以下示例說明了JavaScript中的D3.js Continuous.range()函數：

範例1：當範圍數組為一串顏色時。

HTML

<!DOCTYPE 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>  
    <script src= 
"https://d3js.org/d3-color.v1.min.js"> 
    </script>  
    <script src= 
"https://d3js.org/d3-interpolate.v1.min.js"> 
    </script>  
    <script src= 
"https://d3js.org/d3-scale-chromatic.v1.min.js"> 
    </script>  
</head>  
<body style ="text-align:center">  
    <h2 style="color:green;">Geeksforgeeks</h2> 
      
    <p>D3.js continuous.range() Function </p> 
  
    <script>  
    var continuous = d3.scaleLinear() 
                // Domain ranges -1, 0, 1 
                    .domain([-1, 0, 1]) 
                // Range for the domain 
                    .range(["red", "green", "blue"]); 
  
    document.write("<br/>") 
    document.write("<h3>"+continuous(0)+"</h3>"); 
    document.write("<h3>"+continuous(1)+"</h3>"); 
    document.write("<h3>"+continuous(0.5)+"</h3>"); 
    document.write("<h3>"+continuous(-1)+"</h3>"); 
  
    // Out of domain values  
    document.write("<h3>"+continuous(1.5)+"</h3>"); 
    document.write("<h3>"+continuous(2)+"</h3>"); 
    </script>  
</body>  
</html>

輸出：

範例2：當範圍數組為數字類型時。

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>  
    <script src= 
"https://d3js.org/d3-color.v1.min.js"> 
    </script>  
    <script src= 
"https://d3js.org/d3-interpolate.v1.min.js"> 
    </script>  
    <script src= 
"https://d3js.org/d3-scale-chromatic.v1.min.js"> 
    </script>  
</head>  
<body style ="text-align:center">  
    <h2 style="color:green;">Geeksforgeeks</h2> 
      
    <p>D3.js continuous.range() Function </p> 
  
    <script>  
    var continuous = d3.scaleLinear() 
                // Domain ranges -1, 0, 1 
                    .domain([-1, 0, 1]) 
                // Range for the domain 
                    .range([1,2,3,4,5,6,7,8,9]); 
   
    document.write("<br/>") 
    document.write("<h3>"+continuous(0)+"</h3>"); 
    document.write("<h3>"+continuous(1)+"</h3>"); 
    document.write("<h3>"+continuous(0.5)+"</h3>"); 
    document.write("<h3>"+continuous(-1)+"</h3>"); 
    document.write("<h3>"+continuous(1.5)+"</h3>"); 
    document.write("<h3>"+continuous(2)+"</h3>"); 
    </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 continuous.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。