We used dimensionality reduction to plot average champion builds in two dimensions.
The closer two champions are, the more similar their builds.
This visualization reduces the per game frequency of item purchases into a two-dimensional point. Click on the region, tier, and patch selectors to filter the data. Some combinations of filters may have less data than others. The panel on the right shows the distance each champion's point travelled from your last filter to the current graph ordered from greatest to least change. This makes it easy to see which champion builds vary most between player groups or patches.