D3.js dsv() Function

The d3.dsv() function in D3.js is a part of the request API that returns a request for the file of type DSV. The mime type is text/DSV. An optional row conversion function can be specified to map and filter row objects.

Syntax:

d3.dsv(delimiter, inputfile, function);

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

  • delimiter: It is the delimited such as “,” or “-” and so on that separates the columns.
  • inputfile: It is the location of the input file.
  • function: It is the function that is user-defined which performs certain actions to deal with the data.

Below given are a few examples of the function given above.

Note: Please create and save a file name sample.dsv before going with the code.



Example1:

HTML

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta
            name="viewport"
            path1tent="width=device-width, 
                       initial-scale=1.0"/>
        <title>D3.js dsv() Function</title>
    </head>
    <style></style>
    <body>
        <script src=
        </script>
        <script src=
        </script>
        <script src=
        </script>
  
        <script>
            d3.dsv(",", "sample.dsv", (data) => {
                console.log(data);
            });
        </script>
    </body>
</html>

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Output:

Example 2: When the delimiter is ” ” (space)

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<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta
            name="viewport"
            path1tent="width=device-width, 
                       initial-scale=1.0"/>
        <title>D3.js dsv() Function</title>
    </head>
    <style></style>
    <body>
        <script src=
        </script>
        <script src=
        </script>
        <script src=
        </script>
  
        <script>
            d3.dsv(" ", "sample.dsv", (data) => {
                console.log(data.year, " ", data.population);
            });
        </script>
    </body>
</html>

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Output:

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