d3.schemeRdGy []函数用于返回十六进制颜色代码字符串，该字符串对应于d3.js中“RdGy”发散配色方案的颜色。
用法:
d3.schemeRdGy[k];
参数：该函数接受如上所述和以下描述的单个参数：
- k:此数字介于3到10之间(含3和10)。
返回值：此函数返回十六进制数据格式的颜色字符串。
下面的示例说明了JavaScript中的D3.js schemeRdGy []函数：
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"/>
<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;">Geeksforgeeks</h2>
<p>D3.js schemeRdGy[] Function</p>
<script>
document.write("<p><b>"
+d3.schemeRdGy[10][9]+"</p></b>");
document.write("<p><b>"
+d3.schemeRdGy[10][5]+"</p></b>");
document.write("<p><b>"
+d3.schemeRdGy[10][4]+"</p></b>");
document.write("<p><b>"
+d3.schemeRdGy[10][3]+"</p></b>");
document.write("<p><b>"
+d3.schemeRdGy[10][2]+"</p></b>");
document.write("<p><b>"
+d3.schemeRdGy[10][1]+"</p></b>");
document.write("<p><b>"
+d3.schemeRdGy[10][0]+"</p></b>");
</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"/>
</head>
<style>
div {
padding:6px;
color:white;
text-align:center;
vertical-align:middle;
display:flex;
justify-content:center;
width:fit-content;
margin-top:2px;
height:20px;
}
</style>
<body>
<h2 style="color:green;">
Geeksforgeeks
</h2>
<p>D3.schemeRdGy[] Function</p>
<div class="box1">
<span>d3.schemeRdGy[10][9]</span>
</div>
<div class="box2">
<span>d3.schemeRdGy[10][5]</span>
</div>
<div class="box3">
<span>d3.schemeRdGy[10][4]</span>
</div>
<div class="box4">
<span>d3.schemeRdGy[10][2]</span>
</div>
<div class="box5">
<span>d3.schemeRdGy[10][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>
// Creating different colors for
// different value of k
let color1 = d3.schemeRdGy[9][5];
let color2 = d3.schemeRdGy[10][4];
let color3 = d3.schemeRdGy[9][3];
let color4 = d3.schemeRdGy[9][2];
let color5 = d3.schemeRdGy[9][1];
// Selecting Div using query selector
let box1 = document.querySelector(".box1");
let box2 = document.querySelector(".box2");
let box3 = document.querySelector(".box3");
let box4 = document.querySelector(".box4");
let box5 = document.querySelector(".box5");
// Setting style and BG color of the
// particular DIVs
box1.style.backgroundColor = color1;
box2.style.backgroundColor = color2;
box3.style.backgroundColor = color3;
box4.style.backgroundColor = color4;
box5.style.backgroundColor = color5;
</script>
</body>
</html>输出：
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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 schemeRdGy[] 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。