Using the time scale

Often, we will need to create visualization on a dataset that has time and date dimensions; therefore, D3 provides a built-in time scale to help perform this type of mapping. In this recipe, we will learn how to use the D3 time scale.

Getting ready

Open your local copy of the following file in your web browser:

https://github.com/NickQiZhu/d3-cookbook-v2/blob/master/src/chapter4/time-scale.html .

How to do it...

First, let's take a look at the following code example:

<div id="time" class="clear"> 
    <span>Linear Time Progression<br></span> 
    <span>Mapping [01/01/2016, 12/31/2016] to [0, 1200]<br></span> 
</div> 
 
<script type="text/javascript"> 
    var start = new Date(2016, 0, 1), // <-A 
        end = new Date(2016, 11, 31), 
        range = [0, 1200], 
        time = d3.scaleTime().domain([start, end]) // <-B 
            .rangeRound(range), // <-C &...