Adding the Mean
Explore how to enhance your D3.js histogram by adding a mean line that dynamically animates as the data changes. Understand how to calculate the average value using D3 functions, position the line accurately, and control its layering for clear visibility. This lesson guides you through creating interactive histograms that effectively communicate central data tendencies.
We'll cover the following...
We are going to add a bonus feature to our histogram. The reader may want to know what the mean is in our dataset. The mean is the average value in our dataset. Averages give readers a good idea of what to expect from our data.
We will add the average value by drawing a line in our histogram. The line will be positioned where the average is. In addition, the line will animate into a different location whenever the metric changes. Let’s get started.
Creating the line
In the script section, we are going to create a selection for the line. There will only be one line in our image. It would not be a bad idea to draw it ...