d3.js interpolatePiYG()用法及代码示例

D3.js中的d3.interpolatePiYG()函数是一种发散颜色方案，可以用作连续插值器，从PiYG发散颜色方案返回相应的颜色。

用法:

d3.interpolatePiYG(t);

参数：该函数接受如上所述和以下描述的单个参数。

t:它是[0,1]范围内的数字。

返回值：此函数返回RGB字符串。

下面给出的是上面给出的函数的一些例子。

范例1：

HTML

<!DOCTYPE html> 
<html lang="en"> 
    <head> 
        <meta charset="UTF-8" /> 
        <meta
            name="viewport"
            path1tent="width=device-width,  
                       initial-scale=1.0"/> 
        <title>D3.js interpolatePiYG() Function</title> 
    </head> 
    <style></style> 
    <body> 
        <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> 
        <script> 
            console.log(d3.interpolatePiYG(0)); 
            console.log(d3.interpolatePiYG(0.1)); 
            console.log(d3.interpolatePiYG(0.2)); 
            console.log(d3.interpolatePiYG(0.3)); 
            console.log(d3.interpolatePiYG(0.4)); 
            console.log(d3.interpolatePiYG(0.5)); 
            console.log(d3.interpolatePiYG(0.6)); 
            console.log(d3.interpolatePiYG(0.7)); 
            console.log(d3.interpolatePiYG(0.8)); 
            console.log(d3.interpolatePiYG(0.9)); 
            console.log(d3.interpolatePiYG(1.0)); 
        </script> 
    </body> 
</html>

输出：

范例2：

HTML

<!DOCTYPE html> 
<html lang="en"> 
    <head> 
        <meta charset="UTF-8" /> 
        <meta
            name="viewport"
            content="width=device-width,  
                     initial-scale=1.0"/> 
        <title>D3.js interpolatePiYG() Function</title> 
    </head> 
    <style> 
        div { 
            padding:10px; 
            width:fit-content; 
            height:100px; 
            float:left; 
        } 
    </style> 
    <body> 
        D3.interpolatePiYG() 
        <br /> 
        <br /> 
        <div class="b1"> 
            <span> 
                (0.1) 
            </span> 
        </div> 
        <div class="b2"> 
            <span> 
                (0.2) 
            </span> 
        </div> 
        <div class="b3"> 
            <span> 
                (0.3) 
            </span> 
        </div> 
        <div class="b4"> 
            <span> 
                (0.4) 
            </span> 
        </div> 
        <div class="b5"> 
            <span> 
                (0.5) 
            </span> 
        </div> 
        <div class="b6"> 
            <span> 
                (0.6) 
            </span> 
        </div> 
        <div class="b7"> 
            <span> 
                (0.7) 
            </span> 
        </div> 
        <div class="b8"> 
            <span> 
                (0.8) 
            </span> 
        </div> 
        <div class="b9"> 
            <span> 
                (0.9) 
            </span> 
        </div> 
        <div class="b10"> 
            <span> 
                (1.0) 
            </span> 
        </div> 
        <!--Fetching from CDN of D3.js -->
        <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> 
        <script> 
            // Array of colors is given 
            let color1 = d3.interpolatePiYG(0.1); 
  
            let color2 = d3.interpolatePiYG(0.2); 
            let color3 = d3.interpolatePiYG(0.3); 
            let color4 = d3.interpolatePiYG(0.4); 
            let color5 = d3.interpolatePiYG(0.5); 
            let color6 = d3.interpolatePiYG(0.6); 
            let color7 = d3.interpolatePiYG(0.7); 
            let color8 = d3.interpolatePiYG(0.8); 
            let color9 = d3.interpolatePiYG(0.9); 
            let color10 = d3.interpolatePiYG(1.0); 
  
            let b1 = document.querySelector(".b1"); 
            let b2 = document.querySelector(".b2"); 
            let b3 = document.querySelector(".b3"); 
            let b4 = document.querySelector(".b4"); 
            let b5 = document.querySelector(".b5"); 
            let b6 = document.querySelector(".b6"); 
            let b7 = document.querySelector(".b7"); 
            let b8 = document.querySelector(".b8"); 
            let b9 = document.querySelector(".b9"); 
            let b10 = document.querySelector(".b10"); 
            b1.style.backgroundColor = color1; 
            b2.style.backgroundColor = color2; 
            b3.style.backgroundColor = color3; 
            b4.style.backgroundColor = color4; 
            b5.style.backgroundColor = color5; 
            b6.style.backgroundColor = color6; 
            b7.style.backgroundColor = color7; 
            b8.style.backgroundColor = color8; 
            b9.style.backgroundColor = color9; 
            b10.style.backgroundColor = color10; 
        </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 interpolatePiYG() 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。