| verlander {tigerstats} | R Documentation |
Justin Verlander
Description
PITCHf/x data on Justin Verlander, winner of the 2011 Cy Young Award. Covers his 2009 through 2012 seasons.
Format
A data frame with 15307 observations on the following 12 variables. Each observation is a single pitch.
- season
The year of play
- gamedate
Date of the game in which the pitch was thrown
- pitch_type
Type of pitch thrown: CH (Change-up), CU (Curveball), FF (Four-Seam Fastball), FT (Two-Seam Fastball), SL (Slider). Pitch type is determined by computer algorithm.
- balls
Current ball count
- strikes
Current strike count
- pitches
number of pitches previously thrown in the game
- speed
speed of pitch (in mph). (When crossing plate?)
- px
x-coordinate of pitch (in feet, measured from center of plate)
- pz
vertical coordinate of pitch (in feet above plate)
- pfx_x
the horizontal movement, in inches, of the pitch between the release point and home plate, as compared to a theoretical pitch thrown at the same speed with no spin-induced movement. Measured at 40 feet from home plate.
- pfx_z
the vertical movement, in inches, of the pitch between the release point and home plate, as compared to a theoretical pitch thrown at the same speed with no spin-induced movement. Measured at 40 feet from home plate.
- batter_hand
A factor with two values: L (left) and R (right).
Source
Marchi and Albert: analyzing Baseball Data with R, CRC Press 2014. For more on the PITCHf/x system, see http://en.wikipedia.org/wiki/PITCHf/x.