Using HITf/x to measure skill -- The Hardball Times
Peter Jensen bins batted balls by speed and direction (spray and launch angles, horizontal and vertical angles) to derive expected outcomes. I'm working on the same thing, but using a slightly different approach. I look forward to comparing my results to Peter's.
over 2 years ago
Harry Pavlidis
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How do you see being able to express 3 parameters in a 2 parmater world?
All graphs I see express only 2 of each of vertical angle, horizontal angle or speed.
Do you know if any one has looked at game temp and speed off bat to see if there is any measured difference?
Jeff Zimmerman - Protecting the world from RBI's and Wins from my mom's guest house.
by Jeff Zimmerman on Jun 30, 2009 12:13 AM EDT reply actions
It would need to be a polar surface plot I think
which could be pretty difficult to do. If you try to plot spray, launch, SOB, and LW then you need 4 dimensions. I liked your “heat maps” from the LW post you did previously. To graph stuff you’ll just have to break it down and let the reader (hope we can?) put it back together.
Here's one of my attempts
http://www.beyondtheboxscore.com/2009/6/11/905543/graph-of-the-day-oakland-as-hitf-x
Heat coding the bubbles would be better, but I added a fourth parameter, batter hand. I used words, sorry.
by Harry Pavlidis on Jun 30, 2009 12:01 PM EDT up reply actions
What about using size of the data point
to indicate SOB. That way you could keep using color for batter hand.
by Tommy Bennett on Jun 30, 2009 12:25 PM EDT up reply actions
Doesn't work well unless
you scale the differences, a 77mph bubble an a 100 mph bubble are tough to tell apart unless they’re close. I think color for speed and some type of texture/mark for batter hand would work best.
by Harry Pavlidis on Jun 30, 2009 3:19 PM EDT up reply actions
This is pretty cool.
I wonder how much more predictive stuff like this will be once some of the kinks in the methodology are worked out.
Derosa.
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