Messing around with psuedo-3D plots of pitches. Was working on some charts of the four Dodger starters the Cubs face this week.
Check out this graph of Stults (click for larger).....interesting? Comments on this and its usefulness (e.g. strike zone analysis for Fools or At Bat analysis for key match-ups or A Big plot of everything a guys throws or Average pitch by type) would be appreciated.
Monday, September 3, 2007
Stults - trial balloon
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3 comments:
I really like this graph style. I can think of two main uses. The first is to show a pitcher's repertoire, using "average" pitches. The other is to compare pitches between pitchers. For example, plot Johan and Hoffman's "average" fastballs and changeups, plus a league-average fastball, changeup.
There's a small issue using "average" pitches, namely should it matter where they end up? Should you show them all going right down the middle, the average of where they're typically thrown, or what? I suppose different situations deserve different answers.
Also, I'd make the distance between each circle a standard amount of time (you may be doing this already) and make sure the space is long enough that you can really tell the difference between a 90mph pitch and a 80mph pitch.
I also like seeing where the pitch hits the strike zone -- most PITCH f/x graphs don't show that. It would be cool to see a density plot of where a pitcher throws his curveballs or fastballs or change-ups or whatever. You could even split it between lefties and righties.
I'm using time as the size - each dot is .010 seconds apart. I run the line out past y=1.47 but y>0. So, the slower pitches have more time, thus a larger dot.
Sounds OK, but the size should be y, not (t). So I'm flipping that around the way it should.
This gives the ball perspective.
The number of dots will still be time based, so the distance does/will reflect speed (bigger gaps, faster pitch) - same applies for horizontal movement.
So, in other words :-) same number of dots, size based on distance to viewer. All would end up same size, but fast pitches reach the "big dot" faster, instead of having a smaller big dot than the slower pitches, as it is now.
Now, from the side views.....
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