D3.js interpolateRdGy() Function

Last Updated : 17 Aug, 2020

The d3.interpolateRdGy() function in D3.js is a part of the diverging color scheme which returns the color from the RdBu diverging color scheme in D3.js. Here Rd can be interpreted as red color and Gy can be interpreted as Grey color.

Syntax:

d3.interpolateRdGy(t);

Parameters: This function accepts a single parameter as mentioned above and described below:

t: This is a number which is in the range 0 and 1 inclusively.

Return Values: The above function returns the RGB string.

Below given are a few examples of the function given above.

Example1:

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 interpolateRdGy() 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> 
            // 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.interpolateRdGy(0)); 
            // When t is 0.0 
            console.log(d3.interpolateRdGy(0.1)); 
            // When t is 0.1 
            console.log(d3.interpolateRdGy(0.2)); 
            // When t is 0.2 
            console.log(d3.interpolateRdGy(0.3)); 
            // When t is 0.3 
            console.log(d3.interpolateRdGy(0.4)); 
            // When t is 0.4 
            console.log(d3.interpolateRdGy(0.5)); 
            // When t is 0.5 
            console.log(d3.interpolateRdGy(0.6)); 
            // When t is 0.6 
            console.log(d3.interpolateRdGy(0.7)); 
            // When t is 0.7 
            console.log(d3.interpolateRdGy(0.8)); 
            // When t is 0.8 
            console.log(d3.interpolateRdGy(0.9)); 
            // When t is 0.9 
            console.log(d3.interpolateRdGy(1.0)); 
            // When t is 1.0 
        </script> 
    </body> 
</html> 

Output: RGB of colors for different values of t.

Example 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 interpolateRdGy() Function</title> 
    </head> 
    <style> 
        div { 
            padding: 5px; 
            text-align: center; 
            vertical-align: middle; 
            display: flex; 
            justify-content: center; 
            width: fit-content; 
            height: 50px; 
            float: left; 
        } 
    </style> 
    <body> 
        <h2>D3.interpolateRdGy()</h2> 
        <div class="box1"> 
            <span> 
                (0.1) 
            </span> 
        </div> 
        <div class="box2"> 
            <span> 
                (0.2) 
            </span> 
        </div> 
        <div class="box3"> 
            <span> 
                (0.3) 
            </span> 
        </div> 
        <div class="box4"> 
            <span> 
                (0.4) 
            </span> 
        </div> 
        <div class="box5"> 
            <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 style="color: honeydew;"> 
                (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> 
            // creating different colors for different 
            // Values of t as 0.1,0.2... 1.0 
            let color1 = d3.interpolateRdGy(0.1); 
            let color2 = d3.interpolateRdGy(0.2); 
            let color3 = d3.interpolateRdGy(0.3); 
            let color4 = d3.interpolateRdGy(0.4); 
            let color5 = d3.interpolateRdGy(0.5); 
            let color6 = d3.interpolateRdGy(0.6); 
            let color7 = d3.interpolateRdGy(0.7); 
            let color8 = d3.interpolateRdGy(0.8); 
            let color9 = d3.interpolateRdGy(0.9); 
            let color10 = d3.interpolateRdGy(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; 
        </script> 
    </body> 
</html> 