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D3.js | d3.permute() function

  • Last Updated : 26 Jun, 2019

The d3.permute() function in D3.js is used to permutate the elements of the given array with a given specified array of indexes and it returns the array containing the corresponding element for each given indexes.

Syntax:

d3.permute(array, Index)

Parameters: This function accepts two parameters which are mentioned above and described below:

  • Array: It is the array of elements on which permutation is performed.
  • Index: It is the given index which is used to permutate the given array elements and correspondingly returns the elements of the given array into an array.

Return Value: It returns the array of permuted elements.

Below programs illustrate the d3.permute() function in D3.js.



Example 1: In the below code, the permutation is being done on the elements of the given array with a given specified array of indexes and it returns the array containing the corresponding element for each given indexes.




<html>
  
<head>
    <title>
      Getting permuted array of elements
  </title>
</head>
  
<body>
    <script src='https://d3js.org/d3.v4.min.js'>
  </script>
  
    <script>
        // Initialising the arrays of elements
        var Array1 = ["gfg", "Geek", "Geeks", "GeeksforGeeks"];
        var Array2 = ["a", "ab", "abc", "abcd"];
  
        // Initialising the indexes
        var Index1 = [1, 2, 0, 3];
        var Index2 = [3, 1, 2, 0];
  
        // Calling to d3.permute() function
        A = d3.permute(Array1, Index1);
        B = d3.permute(Array2, Index2);
  
        // Getting permuted array of elements
        document.write(A + "<br>");
        document.write(B + "<br>");
    </script>
</body>
  
</html>

Output:

Geek, Geeks, gfg, GeeksforGeeks
abcd, ab, abc, a

Example 2:




<html>
  
<head>
    <title>
      Getting permuted array of elements
  </title>
</head>
  
<body>
    <script src='https://d3js.org/d3.v4.min.js'>
  </script>
  
    <script>
        // Taking the array of elements and 
        // indexes as the parameters
        // for the function d3.permute()
        A = d3.permute(["Hi", "Hello", "Greet"], [1, 2, 0]);
        B = d3.permute(["Ram", "Shyam", "Geeta", "Hari"],
                       [3, 1, 2, 0]);
  
        // Getting permuted array of elements
        document.write(A + "<br>");
        document.write(B + "<br>");
    </script>
</body>
  
</html>

Output:

Hello, Greet, Hi
Hari, Shyam, Geeta, Ram

Ref: https://devdocs.io/d3~4/d3-array#permute




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