javascript-d3How do I create a linear scale in D3.js using JavaScript?

Creating a linear scale in D3.js using JavaScript is a fairly straightforward process. To begin, you'll need to include the D3 library in your HTML file.

<script src="https://d3js.org/d3.v5.min.js"></script>

Once the library is included, you can create the linear scale by specifying the domain and range:

var x = d3.scaleLinear()
    .domain([0, 100])
    .range([0, 600]);

In the example above, the domain is set to the range of 0-100, and the range is set to 0-600. The output of the scale is a function that can be used to map values from the domain to the range. For example, if we pass the value 50 to the scale, it will return 300:

x(50); // returns 300

Code explanation

• d3.scaleLinear() - creates a linear scale
• .domain([0, 100]) - sets the input domain
• .range([0, 600]) - sets the output range
• x(50) - passes a value to the scale, returns the output

Helpful links

• D3.js Documentation
• MDN Documentation

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