D3.js log.rangeRound() Function

The log.rangeRound() function is used to set the range of the scale to the specified array of values along with this it internally sets the interpolator to interpolatorRound.

Syntax:

log.rangeRound([range]);

Parameters: This function takes a single parameter that is given above and described below.

[range]: An array that contains the range for the specified domain.

Return Value: This function does not return any value.

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">GeekforGeeks</h2>

    <p>log.rangeRound() Function</p>

    <script>
        var log = d3.scaleLog()
            // Domain
            .domain([1, 10])

            // Range for the domain
            .rangeRound([10, 20, 30, 40, 50, 60, 70, 80, 90]);
            
        document.write("<h3>log(1.0): " + log(1.0) + "</h3>");
        document.write("<h3>log(2.5): " + log(2.5) + "</h3>");
        document.write("<h3>log(4): " + log(4) + "</h3>");
        document.write("<h3>log(4.5): " + log(4.5) + "</h3>");
        document.write("<h3>log(1.5): " + log(1.5) + "</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">GeekforGeeks</h2>

    <p>log.rangeRound() Function</p>

    <script>
        var log = d3.scaleLog()
            // Domain
            .domain([1, 10])
            // Range for the domain
            .rangeRound([0, 960]);

        document.write("<br/><div style=float:left;>");
        document.write("<p> With rangeRound()</p>");
        document.write("<h3>" + log(1.5) + "</h3>");
        document.write("<h3>" + log(2.5) + "</h3>");
        document.write("<h3>" + log(3.5) + "</h3>");
        document.write("<h3>" + log(4.5) + "</h3>");
        document.write("<h3>" + log(8.5) + "</h3>");
        document.write(
            "<h3>" + log(10.5) + "</h3></div>");

        var log = d3.scaleLog()
            // Domain
            .domain([1, 10])
            // Range for the domain
            .range([0, 960]);

        document.write(
          "<div style=margin-left:10px;float:left;>");
        document.write("<p> Without rangeRound()</p>");
        document.write("<h3>" + log(1.5) + "</h3>");
        document.write("<h3>" + log(2.5) + "</h3>");
        document.write("<h3>" + log(3.5) + "</h3>");
        document.write("<h3>" + log(4.5) + "</h3>");
        document.write("<h3>" + log(8.5) + "</h3>");
        document.write(
            "<h3>" + log(10.5) + "</h3></div>");
    </script>
</body>

</html>

Output:

D3.js log.rangeRound() Function

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