d3.js pow.rangeRound()用法及代码示例

pow.rangeRound()函数用于将刻度范围设置为指定的值数组，并在内部将插值器设置为interpolatorRound。

用法:

pow.rangeRound([range]);

参数：该函数采用上面给出并在下面描述的单个参数。

[范围]：这是一个包含指定域范围的数组。

返回值：此函数不返回任何内容。

下面给出的是上面给出的函数的一些例子。

范例1：范围数组中的元素为数字类型时。

<!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>  
    <h2 style="color:green;"> 
        Geeks for geeks</h2> 
    <p>pow.rangeRound() Function </p> 
    <script>  
        var pow = d3.scalePow() 
                    // Domain ranges -1, +1 
                        .domain([-1, +1]) 
                    // Range for the domain 
.rangeRound([10, 20, 30, 40, 50, 60, 70, 80, 90]); 
       
        document.write("<br/><div>"); 
        document.write("<p>With rangeRound()"); 
        document.write("<h3>"+pow(10.5)+"</h3>"); 
        document.write("<h3>"+pow(2)+"</h3>"); 
        document.write("<h3>"+pow(11.5)+"</h3>"); 
        document.write("<h3>"+pow(-1)+"</h3>"); 
        document.write("<h3>"+pow(1.15)+"</h3>"); 
        document.write("<h3>"+pow(5)+"</h3></div>"); 
   
        var pow = d3.scaleLinear() 
                    // Domain ranges -1, +1 
                        .domain([-1, +1]) 
                    // Range for the domain 
.range([10, 20, 30, 40, 50, 60, 70, 80, 90]) 
   
        document.write("<br/><div>"); 
        document.write("<p>Without rangeRound()"); 
        document.write("<h3>"+pow(10.5)+"</h3>"); 
        document.write("<h3>"+pow(2)+"</h3>"); 
        document.write("<h3>"+pow(11.5)+"</h3>"); 
        document.write("<h3>"+pow(-1)+"</h3>"); 
        document.write("<h3>"+pow(1.15)+"</h3>"); 
        document.write("<h3>"+pow(5)+"</h3></div>"); 
    </script>  
</body>  
</html>

输出：

范例2：范围数组中的元素为字符串类型时。

<!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>  
    <h2 style="color:green;">Geeks for geeks</h2> 
    <p>pow.rangeRound() Function </p> 
    <script>  
        var pow = d3.scalePow() 
                    // Domain ranges -1, +1 
                        .domain([-1, +1]) 
                    // Range for the domain 
.rangeRound(["green", "blue", "red", "black", "white"]); 
       
        document.write("<br/><div>"); 
        document.write( 
"<p>d3.rangeRound() does not work with range of type string"); 
        document.write("<h3>"+pow(10.5)+"</h3>"); 
        document.write("<h3>"+pow(2)+"</h3>"); 
        document.write("<h3>"+pow(11.5)+"</h3>"); 
    </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 pow.rangeRound() 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。