D3.js continuous.range() Function

Last Updated : 09 Feb, 2021

The continuous.range() function in d3.js is used to set the range of the scale to the specified array of values that must contain two or more than two values. The elements in the range can be number or string.

Syntax:

continuous.range([range]);

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

[range]: This is an array that contains the range for the domain specified.

Return Values: This function does not return anything.

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

Example1: When the range array is of a string of colors.

HTML

<!DOCTYPE html> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" path1tent="width=device-width,   initial-scale=1.0"/> <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> </head> <body style ="text-align: center"> <h2 style="color: green;">Geeksforgeeks</h2> <p>D3.js continuous.range() Function </p> <script>   var continuous = d3.scaleLinear()  // Domain ranges -1, 0, 1  .domain([-1, 0, 1])  // Range for the domain  .range(["red", "green", "blue"]);  document.write("<br/>")  document.write("<h3>"+continuous(0)+"</h3>");  document.write("<h3>"+continuous(1)+"</h3>");  document.write("<h3>"+continuous(0.5)+"</h3>");  document.write("<h3>"+continuous(-1)+"</h3>");  // Out of domain values   document.write("<h3>"+continuous(1.5)+"</h3>");  document.write("<h3>"+continuous(2)+"</h3>");  </script> </body> </html>

Output:

Example 2: When the range array is of type number.

HTML

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8" /> <meta name="viewport" path1tent="width=device-width,   initial-scale=1.0"/> <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> </head> <body style ="text-align: center"> <h2 style="color: green;">Geeksforgeeks</h2> <p>D3.js continuous.range() Function </p> <script>   var continuous = d3.scaleLinear()  // Domain ranges -1, 0, 1  .domain([-1, 0, 1])  // Range for the domain  .range([1,2,3,4,5,6,7,8,9]);    document.write("<br/>")  document.write("<h3>"+continuous(0)+"</h3>");  document.write("<h3>"+continuous(1)+"</h3>");  document.write("<h3>"+continuous(0.5)+"</h3>");  document.write("<h3>"+continuous(-1)+"</h3>");  document.write("<h3>"+continuous(1.5)+"</h3>");  document.write("<h3>"+continuous(2)+"</h3>");  </script> </body> </html>