Critique

Functionality that works (Step-by-Step Guide):

What could be better? Certain aspects that could allow for better learnability for the user.

1. Scaling of the x-axis when changing range of year is set to 5-year increment and does not adjust for better viewability as the range of year is shortened.

For example, below is the line graph for the years 2000 - 2015 filtered by Classical, Pop, Swing, Folk, and Country:

And, below is the line graph for the years 2010 - 2015 filtered by Classical, Pop, Swing, Folk, and Country:

We can see a couple of issues with this dotted vertical scatterplot.

1. The x-axis needs to be scaled according to the number of years' worth of data that the graph is displaying. We can see in the 2000 - 2015 data that scaling the axis based on 5-year increment is high readability but doing so in the 2010 - 2015 can be troublesome for the user especially when it is on a very wide-screen.

2. Secondly, as seen in the image below, in the scatter plot graph each dot represents a song that placed a certain rank, and the title of the graph is reactive over whichever scatter dot we place our cursor on. Unless this is displayed on a massive screen, there are too many dots in each column, and it is sensitive to move our cursor over, making it hard to read through each of the songs of that year that placed in the Billboard Top 100 based on the genres that we filtered based on.

It would be significantly helpful if in the graph title it showed the Billboard Rank along with the title of the song.