Where do extra base hits come from? The goal here is to show the gap between SLGCON and BABIP, along with their general trends, along two parameters: the initial speed and the launch angle of a batted ball. Data is from the April HITf/x sample.
Let's split that last one up, at the 90mph mark (that's too low, as you can see below).
Digest those. Next time around, I'll isolate velocity by direction (xyz) instead of giving you the overall speed.