D3.js continuous.tickFormat() Function

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The continuous.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:

continuous.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 continuous.tickFormat() function in D3.js:

Example 1:

HTML

<!DOCTYPE html> 
<html> 
  
<head> 
    <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> 
    <h1 style="color: green"> 
        zambiatek 
    </h1> 
  
    <p>continuous.tickFormat() Function </p> 
  
    <script> 
        var x = d3.scaleLinear() 
            .domain([0, 1]) 
            .range([1, 2, 3, 4, 5, 6]); 
  
        var ticks = x.ticks(3) 
        var tickFormat = x.tickFormat(3, " %"); 
  
        document.write("<h3>" + 
            ticks.map(tickFormat) + 
            "</h3>"); 
    </script> 
</body> 
  
</html> 

Output:

Example 2:

HTML

<!DOCTYPE html> 
<html> 
  
<head> 
    <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> 
    <h1 style="color: green"> 
        zambiatek 
    </h1> 
  
    <p>continuous.tickFormat() Function </p> 
  
    <script> 
        var x = d3.scaleLinear() 
            .domain([0, 1]) 
            .range(["red", "blue", "green", "orange"]); 
  
        var ticks = x.ticks(5) 
        var tickFormat = x.tickFormat(5, " $"); 
  
        document.write("<h3>" + 
            ticks.map(tickFormat) + 
            "</h3>") 
    </script> 
</body> 
  
</html> 

Output:

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