D3.js pow.tickFormat() Function

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The pow.tickFormat() function is used to change the format of the tick values. It returns a number format function that is suitable for displaying a tick value.

Syntax:

pow.tickFormat( count, specifier )

Parameters: This function accepts two parameters as mentioned above and described below.

count: It is the number of tick values to be used. It is an optional parameter.
specifier: It is a string which specifies the format to be used. It is an optional parameter.

Return Values: This function does not return anything.

The program below illustrates the pow.tickFormat() function in D3.js:

Example 1:

html

<!DOCTYPE html> 
<html lang="en"> 
<head> 
  <meta charset="UTF-8" /> 
  <meta name="viewport"
        content="width=device-width, 
                 initial-scale=1.0" /> 
  <title>zambiatek</title> 
  <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> 
  <h2 style="color: green">zambiatek</h2> 
    
<p>pow.tickFormat() Function </p> 
  
  <script> 
    var x = d3.scalePow() 
      .domain([0, 1]) 
      .range([1, 2, 3, 4, 5, 6]) 
      .exponent(0.5); 
  
    var ticks = x.ticks(5) 
    var tickFormat = x.tickFormat(100000, " %"); 
  
    document.write("<h3>" +  
        ticks.map(tickFormat) + "</h3>"); 
  </script> 
</body> 
</html>

Output:

Example 2:

html

<!DOCTYPE html> 
<html lang="en"> 
<head> 
  <meta charset="UTF-8" /> 
  <meta name="viewport" 
        content="width=device-width, 
                 initial-scale=1.0" /> 
  <title>zambiatek</title> 
  <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> 
  <h2 style="color: green">zambiatek</h2> 
    
<p>pow.tickFormat() Function </p> 
  
  <script> 
    var x = d3.scalePow() 
      .domain([1, 10]) 
      .range([10, 20, 30, 40, 50, 60]) 
      .exponent(2); 
  
    var ticks = x.ticks(5) 
    var tickFormat = x.tickFormat(10, " $"); 
  
    document.write("<h3>" +  
        ticks.map(tickFormat) + "</h3>"); 
  </script> 
</body> 
</html>

Output:

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