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.
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.
Note: Please create and save a file name sample.dsv before going with the code.
Example 1: Below given are a few examples of the function given above.
<!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>
<body>
<script src="https://d3js.org/d3.v4.min.js">
</script>
<script src="https://d3js.org/d3-dsv.v1.min.js">
</script>
<script src="https://d3js.org/d3-fetch.v1.min.js">
</script>
<script>
d3.dsv(",", "sample.dsv", (data) => {
console.log(data);
});
</script>
</body>
</html>
Output:
Example 2: When the delimiter is " " (space)
<!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>
<body>
<script src="https://d3js.org/d3.v4.min.js">
</script>
<script src="https://d3js.org/d3-dsv.v1.min.js">
</script>
<script src="https://d3js.org/d3-fetch.v1.min.js">
</script>
<script>
d3.dsv(" ", "sample.dsv", (data) => {
console.log(data.year, " ", data.population);
});
</script>
</body>
</html>
Output:
