How to call d3.svg.line() independently?

@tressie.damore 

To call d3.svg.line() independently, you first need to include D3.js library in your HTML document. You can do this by adding the following script tag in your HTML file:

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<script src="https://d3js.org/d3.v3.min.js"></script>

Then, you can create an instance of d3.svg.line() by calling it like this:

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var line = d3.svg.line();

You can then customize the line generator by setting various attributes such as x, y, interpolate, etc. For example, you can set the x and y accessor functions like this:

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line.x(function(d) { return d.x; })
    .y(function(d) { return d.y; });

Finally, you can use the line generator to generate a path element by passing an array of data points to it like this:

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var data = [
    {x: 0, y: 0},
    {x: 100, y: 50},
    {x: 200, y: 100},
    {x: 300, y: 150}
];

var svg = d3.select("body")
    .append("svg")
    .attr("width", 400)
    .attr("height", 200);

svg.append("path")
    .attr("d", line(data))
    .attr("stroke", "black")
    .attr("stroke-width", 2)
    .attr("fill", "none");

This will create a simple line chart on the web page using D3.js. Remember to adjust the data points and styling attributes based on your requirements.