D3.js schemeRdBu[]函数

d3.js 中的d3.schemeRdBu[]函数用于返回 Hex 代码中的颜色。此方案是 D3.js 中发散配色方案的一部分。这给出了红色和蓝色十六进制代码颜色范围内的颜色。

句法：

d3.schemeRdBu[k];

参数：此函数接受如上所述和如下所述的单个参数：

• t：任意数字或十六进制码的索引。

返回值：它返回颜色的十六进制颜色代码。

下面的示例说明了 JavaScript 中的 D3.js schemeRdBu[]函数：

示例 1：

HTML

    
        
        
        D3.js schemeRdBu[] Function
    
    
    
        
        
        
        
        
        
        
        
        
        
            console.log(d3.schemeRdBu[3][0]);
            console.log(d3.schemeRdBu[3][1]);
            console.log(d3.schemeRdBu[11][0]);
            console.log(d3.schemeRdBu[11][1]);
            console.log(d3.schemeRdBu[11][2]);
            console.log(d3.schemeRdBu[11][3]);
        
    

输出：

示例 2：

HTML

    
        
        
        D3.js schemeRdBu[] Function
    
    
        div {
            padding: 5px;
            text-align: center;
            vertical-align: middle;
            display: flex;
            justify-content: center;
            width: fit-content;
            height: 50px;
            float: left;
        }
    
    
        D3.schemeRdBu()
        
            
                (0.1)
            
        
        
            
                (0.2)
            
        
        
            
                (0.3)
            
        
        
            
                (0.4)
            
        
        
            
                (0.5)
            
        
        
            
                (0.6)
            
        
        
            
                (0.7)
            
        
        
            
                (0.8)
            
        
        
            
                (0.9)
            
        
        
            
                (1.0)
            
        
        
        
        
        
        
        
        
        
        
        
            // Creating different colors for 
            // different values in a array
            let color1 = d3.schemeRdBu[3][0];
            let color2 = d3.schemeRdBu[3][1];
            let color3 = d3.schemeRdBu[3][2];
            let color4 = d3.schemeRdBu[4][3];
            let color5 = d3.schemeRdBu[10][5];
            let color6 = d3.schemeRdBu[8][5];
            let color7 = d3.schemeRdBu[10][2];
            let color8 = d3.schemeRdBu[11][5];
            let color9 = d3.schemeRdBu[11][1];
            let color10 = d3.schemeRdBu[11][0];
  
            // 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");
            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");
  
            // 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;
            b6.style.backgroundColor = color6;
            b7.style.backgroundColor = color7;
            b8.style.backgroundColor = color8;
            b9.style.backgroundColor = color9;
            b10.style.backgroundColor = color10;
        
    

输出：