Analyzing Baseball Data with R

Analyzing Baseball Data with R

by Max Marchi, Jim Albert
     
 

ISBN-10: 1466570229

ISBN-13: 9781466570221

Pub. Date: 11/05/2013

Publisher: Taylor & Francis

With its flexible capabilities and open-source platform, R has become a major tool for analyzing detailed, high-quality baseball data. Analyzing Baseball Data with R provides an introduction to R for sabermetricians, baseball enthusiasts, and students interested in exploring the rich sources of baseball data. It equips readers with the necessary

Overview

With its flexible capabilities and open-source platform, R has become a major tool for analyzing detailed, high-quality baseball data. Analyzing Baseball Data with R provides an introduction to R for sabermetricians, baseball enthusiasts, and students interested in exploring the rich sources of baseball data. It equips readers with the necessary skills and software tools to perform all of the analysis steps, from gathering the datasets and entering them in a convenient format to visualizing the data via graphs to performing a statistical analysis.

The authors first present an overview of publicly available baseball datasets and a gentle introduction to the type of data structures and exploratory and data management capabilities of R. They also cover the traditional graphics functions in the base package and introduce more sophisticated graphical displays available through the lattice and ggplot2 packages. Much of the book illustrates the use of R through popular sabermetrics topics, including the Pythagorean formula, runs expectancy, career trajectories, simulation of games and seasons, patterns of streaky behavior of players, and fielding measures. Each chapter contains exercises that encourage readers to perform their own analyses using R. All of the datasets and R code used in the text are available online.

This book helps readers answer questions about baseball teams, players, and strategy using large, publically available datasets. It offers detailed instructions on downloading the datasets and putting them into formats that simplify data exploration and analysis. Through the book’s various examples, readers will learn about modern sabermetrics and be able to conduct their own baseball analyses.

Product Details

ISBN-13:
9781466570221
Publisher:
Taylor & Francis
Publication date:
11/05/2013
Series:
Chapman & Hall/CRC The R Series , #14
Edition description:
New Edition
Pages:
352
Sales rank:
319,598
Product dimensions:
5.90(w) x 9.20(h) x 1.00(d)

Table of Contents

The Baseball Datasets
Introduction
The Lahman Database: Season-by-Season Data
Retrosheet Game-by-Game Data
Retrosheet Play-by-Play Data
Pitch-by-Pitch Data

Introduction to R
Introduction
Installing R and RStudio
Vectors
Objects and Containers in R
Collection of R Commands
Reading and Writing Data in R
Data Frames
Packages
Splitting, Applying, and Combining Data

Traditional Graphics
Introduction
Factor Variable
Saving Graphs
Dot Plots
Numeric Variable: Stripchart and Histogram
Two Numeric Variables
A Numeric Variable and a Factor Variable
Comparing Ruth, Aaron, Bonds, and A-Rod
The 1998 Home Run Race

The Relation between Runs and Wins
Introduction
The Teams Table in Lahman's Database
Linear Regression
The Pythagorean Formula for Winning Percentage
The Exponent in the Pythagorean Formula
Good and Bad Predictions by the Pythagorean Formula
How Many Runs for a Win?

Value of Plays Using Run Expectancy
The Runs Expectancy Matrix
Runs Scored in the Remainder of the Inning
Creating the Matrix
Measuring Success of a Batting Play
Albert Pujols
Opportunity and Success for All Hitters
Position in the Batting Lineup
Run Values of Different Base Hits
Value of Base Stealing

Advanced Graphics
Introduction
The lattice Package
The ggplot2 Package

Balls and Strikes Effects
Introduction
Hitter's Counts and Pitcher's Counts
Behaviors by Count

Career Trajectories
Introduction
Mickey Mantle's Batting Trajectory
Comparing Trajectories
General Patterns of Peak Ages
Trajectories and Fielding Position

Simulation
Introduction
Simulating a Half Inning
Simulating a Baseball Season

Exploring Streaky Performances
Introduction
The Great Streak
Streaks in Individual At-Bats
Local Patterns of Weighted On-Base Average

Learning about Park Effects by Database Management Tools
Introduction
Installing MySQL and Creating a Database
Connecting R to MySQL
Filling a MySQL Game Log Database from R
Querying Data from R
Baseball Data as MySQL Dumps
Calculating Basic Park Factors

Exploring Fielding Metrics with Contributed R Packages
Introduction
A Motivating Example: Comparing Fielding Metrics
Comparing Two Shortstops

Appendix A: Retrosheet Files Reference
Appendix B: Accessing and Using MLBAM Gameday and PITCHf/x Data

Bibliography

Index

Further Reading and Exercises appear at the end of each chapter.

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