Data: https://gist.github.com/Junying-Li/72ef4641efd6b4abf371f5d9f4267a56

Iterated from last week's visualization.

What's new?

1. Added buttons to interact with users.
2. When click on a button, the bar chart will filter and sort data.
3. Added transition.

X-axis: region that earthquake occured.

Y-axis: Deaths in earthquake.

This bar plot shows the deaths caused by earchquakes in mutiple regions in different period of 19 century.