D3.js interpolatePRGn()函数

D3.js 中的d3.interpolatePRGn()函数是发散配色方案的一部分，它从 D3.js 中的 PRGn 发散配色方案返回颜色。这里 Pr 可以解释为紫色，Gn 可以解释为绿色。请浏览示例以便更好地理解。

句法：

d3.interpolatePRGn(t);

参数：此函数接受如上所述和如下所述的单个参数：

• t：这是一个在 [0,1] 范围内的数字

返回值：此函数返回一个 RGB字符串。

下面给出了上面给出的函数的几个例子。

示例 1：

HTML

    
        
        
        D3.js interpolatePRGn() Function
    
    
    
        
        
        
        
        
        
        
        
  
        
            // When t is in range [0,1]
            // Value of t varies as 0.1, 0.2 ....1.0
            // Output is RGB string
            console.log(d3.interpolatePRGn(0));
            console.log(d3.interpolatePRGn(0.1));
            console.log(d3.interpolatePRGn(0.2));
            console.log(d3.interpolatePRGn(0.3));
            console.log(d3.interpolatePRGn(0.4));
            console.log(d3.interpolatePRGn(0.5));
            console.log(d3.interpolatePRGn(0.6));
            console.log(d3.interpolatePRGn(0.7));
            console.log(d3.interpolatePRGn(0.8));
            console.log(d3.interpolatePRGn(0.9));
            console.log(d3.interpolatePRGn(1.0));
        
    

输出：

示例 2：

HTML

    
        
        
        D3.js interpolatePRGn() Function
    
    
        div {
            padding: 10px;
            width: fit-content;
            height: 100px;
            float: left;
        }
    
    
        
            D3.interpolatePRGn()
        
        
        
        
            
                (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 of t as 0.1,0.2... 1.0
            let color1 = d3.interpolatePRGn(0.1);
            let color2 = d3.interpolatePRGn(0.2);
            let color3 = d3.interpolatePRGn(0.3);
            let color4 = d3.interpolatePRGn(0.4);
            let color5 = d3.interpolatePRGn(0.5);
            let color6 = d3.interpolatePRGn(0.6);
            let color7 = d3.interpolatePRGn(0.7);
            let color8 = d3.interpolatePRGn(0.8);
            let color9 = d3.interpolatePRGn(0.9);
            let color10 = d3.interpolatePRGn(1.0);
  
            // 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：