Dynamic axes using the update pattern example with JOIN

In this visualization, the data that's rendered in the view changes because of user interaction Testing the new join() version.

Steps

• Make the nesting dynamic
• Nest on health, stress dynamically
• Make x-axis interactive so remove and enter are also needed

Concept

A chart showing distribution or relation between to variables. The vriables can be chosen through a dropdown menu resulting in a rerendering of datapoints and axis.

• Group students by a variable on the x axis.
• Get data from different vars on y axis

Notes

• Note that d3 has a new way of handling enter, update and exit explicitly as explained in this article.
• The options in the form are generated from the data using a data join
• The scales, the data and the selected opton are global. I found that to be nicer than to keep passing them everywhere
• If you want to add a new option to this interactive graph, all you have to do is add a new computed variable in the prepareData module and everything else will happen automatic
• Observe how prepareData module now exports 2 functions separately which we can use to have greater control over the transformation of data from our index.js file.

Inspiration

• Freecodecamp article on the update pattern
• Curran's video on the general update pattern
• An older example I made using variable axes
• An example from a previous class on the subject using dynamic values and axis