Batter Run Value Heat Map
Batter

Start Date
End Date

Compare to another batter. *Optional*

Compare to Start Date
Compare to End Date
Scale
Plot Type
StrikesBalls
Pitcher handedness

Compare to League Average
Regression Amount

Select a valid start and stop dates with all fields filled in or no data will be generated.

Pitch Type (Leave blank for all)
CH, Change-up
CU, Curveball
EP, Ephuus
FA, Fastball
FC, Cut Fastball
FF, 4-Seam Fastball
FS, Split-finger Fastball
FT, 2-Seam Fastball
KC, Knuckle Curve
KN, Knuckleball
SC, Screwball
SI, Sinker
SL, Slider
UN, Unknown


Definitions:

Compare to Another Batter - This function looks at the two batters over the same time frame and set of conditions. Then it subtracts the run values for the second hitter from the first hitter. For example, if the Batter had an average run value of -0.1 in a zone and the Compare to Another Batter had an average run value of 0.1, the output for that zone would be -0.2 (-0.1 - 0.1). For the best output, compare the hitter to another player or league average because for every player they have a negative average run value in the strike zone and a positive average run value out of the strike zone. It is important to know how much the hitter deviates from another player or the league average.

Compare to League Average - This function works the same as Compare to Another Batter, but instead it compares the selected batter to the league average. Creating the league average is extremely time consuming (hours of processing), so as of right now there is a league average for both (right and left), right and left handed pitchers for both the 2.4 inch and 6 inch scales (6 total zones). For the best output, compare the hitter to another player or league average because for every player they have a negative average run value in the strike zone and a positive average run value out of the strike zone. It is important to know how much the hitter deviates from another player or the league average.

Regression Amount - This number is the amount of league average values that are added to the players total. At least some value (10 to 30) should be added to each player to make sure that each outputted data point has some values associated with that zone and that a few extreme values do not incorrectly dominate the outputted image.

Scale - Scale may need to be adjusted for a cleaner output. The data is put into subsets and there may not be enough data to have smooth and/or accurate output. The scales are based on the average run value per pitch. The 2.4 inch scale is 15x15 (225 total) outputted data zones and the 6 inch scale is 6 by 6 (36 total) outputted data zones.

Pitch Type - The Pitch Types are designated by MLB and have not been corrected. In 2010, MLB went from using just FA (fastball) and divided it up into FF (4-Seam Fastball) and FT (2-Seam Fastball).