The d3.interpolateSpectral() function is used to return the color from the “Spectral” diverging color scheme. The color returned by this function is in the form of an RGB string.
Syntax:
d3.interpolateSpectral(t);
Parameters: This function takes only one parameter as given above and described below.
- t: This parameter takes a number that lies in range 0 to 1.
Return Values: This function returns an RGB string.
Below given are a few examples of the function given above.
Example1:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" path1tent="width=device-width, initial-scale=1.0"/> <title>Geeks for neveropen</title> <script src= </script> <script src= </script> <script src= </script> <script src= </script> </head> <style> h2{ color: green; } p{ line-height: 1px; } </style> <body> <h2>Geeks for neveropen</h2> <p>Different colors from interpolateSpeactral(t) are: </p> <script> document.write( "<p><b>"+d3.interpolateSpectral(0.9)+"</p></b>"); document.write( "<p><b>"+d3.interpolateSpectral(0.5)+"</p></b>"); document.write( "<p><b>"+d3.interpolateSpectral(0.4)+"</p></b>"); document.write( "<p><b>"+d3.interpolateSpectral(0.3)+"</p></b>"); document.write( "<p><b>"+d3.interpolateSpectral(0.2)+"</p></b>"); document.write( "<p><b>"+d3.interpolateSpectral(0.1)+"</p></b>"); </script> </body> </html> |
Output:
Example 2:
<!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: fit-content; margin-top: 2px; height: 20px; } </style> <body> <h2>D3.interpolateSpectral(t) </h2> <div class="box1"> <span>d3.interpolateSpectral(0.5)</span> </div> <div class="box2"> <span>d3.interpolateSpectral(0.4)</span> </div> <div class="box3"> <span>d3.interpolateSpectral(0.3)</span> </div> <div class="box4"> <span>d3.interpolateSpectral(0.2)</span> </div> <div class="box5"> <span>d3.interpolateSpectral(0.1)</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 value of k let color1= d3.interpolateSpectral(0.5); let color2= d3.interpolateSpectral(0.4); let color3= d3.interpolateSpectral(0.3); let color4= d3.interpolateSpectral(0.2); let color5= d3.interpolateSpectral(0.1); // 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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