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D3.js pow.copy() Function
  • Last Updated : 23 Aug, 2020

The pow.copy() function is used to create and return an exact copy of the given scale. Any change in the original scale will not affect the return scale and vice-versa.

Syntax:

pow.copy();

Parameters: This function does not accept any parameters.

Return Values: This function returns the exact copy of the original scale.

Example 1:



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>
</head>
  
<body>
    <h2 style="color: green;">GeeksforGeeks</h2>
  
    <p>D3.js pow.copy() Function </p>
  
    <script>
        var pow = d3.scalePow()
            .domain([1, 10])
            .range([10, 20, 30, 40, 50, 60]);
              
        let powCopy = pow.copy();
  
        document.write("<h3>Original scale: " 
                + pow(2.5) + "</h3>");
  
        document.write("<h3>Copy scale: " 
                + powCopy(2.5) + "</h3>");
    </script>
</body>
  
</html>

Output:

Example 2:

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>
</head>
  
<body>
    <h2 style="color: green;">GeeksforGeeks</h2>
  
    <p>pow.copy() Function </p>
  
    <script>
        var pow = d3.scalePow()
            .domain([1, 10])
            .range([10, 20, 30, 40, 50, 60]);
  
        let powCopy = pow.copy();
  
        document.write("<h3>Original scale: " 
                + pow(2.5) + "</h3>");
  
        document.write("<h3>Copy scale: " 
                + powCopy(2.5) + "</h3>");
                  
        pow.exponent(2);
        document.write("<p> Changes in original "
            + "scale does not affect copy scale.</p>");
  
        document.write("<h3>Original scale: "
                    + pow(2.5) + "</h3>");
                      
        document.write("<h3>Copy scale: " 
                    + powCopy(2.5) + "</h3>");
    </script>
</body>
  
</html>

Output:




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