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D3.js interpolateYlOrRd() Function

The d3.interpolateYlOrRd() function in d3.js is used to return an RGB string of color from the diverging color scheme of “YlOrRd”. 

Syntax:

d3.interpolateYlOrRd(t);

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

  • t: It is numeric value which ranges in [0,1].

Return Values: This function returns an RGB color string.

Below examples illustrate the D3.js interpolateYlOrRd() function in JavaScript:

Example1:

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 interpolateYlOrRd() Function</title>
    </head>
    <style></style>
    <body>
        <!--Fetching from CDN of D3.js -->
        <script src=
        </script>
        <script src=
        </script>
        <script src=
        </script>
        <script src=
"https://d3js.org/d3- scale-chromatic.v1.min.js">
        </script>
        <script>
            console.log(d3.interpolateYlOrRd(0.14));
            console.log(d3.interpolateYlOrRd(0.4));
            console.log(d3.interpolateYlOrRd(0.2));
            console.log(d3.interpolateYlOrRd(0.25));
            console.log(d3.interpolateYlOrRd(0.54));
            console.log(d3.interpolateYlOrRd(0.85));
            console.log(d3.interpolateYlOrRd(2));
            console.log(d3.interpolateYlOrRd(1));
        </script>
    </body>
</html>


Output:

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>Document</title>
    </head>
    <style>
        div {
            padding: 6px;
            text-align: center;
            vertical-align: middle;
            display: flex;
            justify-content: center;
            width: 90px;
            height: 50px;
            float: left;
        }
    </style>
    <body>
        <h2>D3.interpolateYlOrRd()</h2>
        <div class="box1">
            <span> </span>
        </div>
        <div class="box2">
            <span> </span>
        </div>
        <div class="box3">
            <span> </span>
        </div>
        <div class="box4">
            <span> </span>
        </div>
        <div class="box5">
            <span> </span>
        </div>
        <!--Fetching from CDN of D3.js -->
        <script src=
        </script>
        <script src=
        </script>
        <script src=
        </script>
        <script src=
        </script>
        <script>
            // Creating different colors for different
            // Values of t is 0.1
            let color1 = d3.interpolateYlOrRd(0.1);
            // Values of t is 0.3
            let color2 = d3.interpolateYlOrRd(0.3);
            // Values of t is 0.5
            let color3 = d3.interpolateYlOrRd(0.5);
            // Values of t is 0.8
            let color4 = d3.interpolateYlOrRd(0.8);
            // Values of t is 1.0
            let color5 = d3.interpolateYlOrRd(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");
  
            // 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>


Output:

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