players

A data frame with the full name and corresponding ID for
every player. This data is used during <code>scrapeFX</code> to
append a name to the atbat table so we can reference data
by batter_name and pitcher_name without any extra hassle.
This was constructed by taking the unique name and ID
combinations from every player file of the form -
<url>http://gd2.mlb.com/components/game/mlb/year_YYYY/month_MM/day_DD/gid_YYYY_MM_DD_xxxmlb_yyymlb_1/players.xml</url>

With pitchRx, one can easily obtain Major League Baseball Advanced
    Media's Gameday data (as well as store it in a remote database). The
    Gameday website hosts a wealth of data in XML format, but perhaps most
    interesting is PITCHf/x. Among other things, PITCHf/x data can be used to
    recreate a baseball's flight path from a pitcher's hand to home plate. With
    pitchRx, one can easily create animations and interactive 3D scatterplots
    of the baseball's flight path. PITCHf/x data is also commonly used to
    generate a static plot of baseball locations at the moment they cross home
    plate. These plots, sometimes called strike-zone plots, can also refer to a
    plot of event probabilities over the same region. pitchRx provides an easy
    and robust way to generate strike-zone plots using the ggplot2 package.

players: All MLB players from 2008-2012

Description

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