The d3.interpolateRainbow() function is used to return a string of RGB color that corresponds to the d3.interpolateWarm in range 0 to 0.5 and d3.interpolateCool in range 0.5 to 1.0 both inclusive thus it forms the cyclic less-angry rainbow color scheme in d3.js.
Syntax:
d3.interpolateRainbow(t);
Parameters: This function accepts single parameter as mentioned above and described below:
- t: It is a numeric value that ranges in [0, 1].
Return Values: This function returns a string of RGB colors.
Below given are a few examples of the function given above.
Example 1:
HTML
<!DOCTYPE html> <html lang="en"> Â Â <head> Â Â Â Â <meta charset="UTF-8"> Â Â Â Â <meta name="viewport" content= Â Â Â Â Â Â Â Â "width=device-width, initial-scale=1.0"> Â Â Â Â Â Â <!--Fetching from CDN of D3.js -->Â Â Â Â </script> Â Â Â Â <script src= Â Â Â Â </script> Â Â Â Â <script src= Â Â Â Â </script> Â Â Â Â <script src= Â Â Â Â </script> </head> Â Â <body> Â Â Â Â <script> Â Â Â Â Â Â Â Â console.log(d3.interpolateRainbow(0.4)); Â Â Â Â Â Â Â Â console.log(d3.interpolateRainbow(0.3)); Â Â Â Â Â Â Â Â console.log(d3.interpolateRainbow(0.2)); Â Â Â Â Â Â Â Â console.log(d3.interpolateRainbow(0.5)); Â Â Â Â Â Â Â Â console.log(d3.interpolateRainbow(0.4)); Â Â Â Â Â Â Â Â console.log(d3.interpolateRainbow(0.9)); Â Â Â Â Â Â Â Â console.log(d3.interpolateRainbow(0.2)); Â Â Â Â Â Â Â Â console.log(d3.interpolateRainbow(0)); Â Â Â Â </script> </body> Â Â </html> |
Output:
rgb(226, 183, 47) rgb(255, 120, 71) rgb(254, 75, 131) rgb(175, 240, 91) rgb(226, 183, 47) rgb(76, 110, 219) rgb(254, 75, 131) rgb(110, 64, 170)
Example 2:
HTML
<!DOCTYPE html> <html lang="en">   <head>     <meta charset="UTF-8">     <meta name="viewport" content=         "width=device-width, initial-scale=1.0">       <style>         div {             padding: 6px;             text-align: center;             vertical-align: middle;             display: flex;             justify-content: center;             width: 90px;             height: 50px;             float: left;         }     </style>       <!--Fetching from CDN of D3.js -->    </script>     </script>     <script src=     </script>     <script src=     </script> </head>   <body>     <h2>D3.interpolateRainbow() </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>       <script>           // Creating different colors for         // different Values of t is 0         let color1 =             d3.interpolateRainbow(0);           // Values of t is 0.1         let color2 =             d3.interpolateRainbow(0.1);           // Values of t is 0.3         let color3 =             d3.interpolateRainbow(0.3);           // Values of t is 0.5         let color4 =             d3.interpolateRainbow(0.5);           // Values of t is 0.8         let color5 =             d3.interpolateRainbow(0.8);           // 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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