openintro (version 2.4.0)

mlb_teams: Major League Baseball Teams Data.

Description

A subset of data on Major League Baseball teams from Lahman's Baseball Database. The full data set is available in the Lahman R package.

Usage

mlb_teams

Format

A data frame with 2784 rows and 41 variables.

year

Year of play.

league_id

League the team plays in with levels AL (American League) and NL (National League).

division_id

Division the team plays in with levels W (west), E (east) and C (central).

rank

Team's rank in their division at the end of the regular season.

games_played

Games played.

home_games

Games played at home.

wins

Number of games won.

losses

Number of games lost.

division_winner

Did the team win their division? Levels of Y (yes) and N (no).

wild_card_winner

Was the team a wild card winner. Levels of Y (yes) and N (no).

league_winner

Did the team win their league? Levels of Y (yes) and N (no).

world_series_winner

Did the team win the World Series? Levels of Y (yes) and N (no).

runs_scored

Number of runs scored during the season.

at_bats

Number of at bats during the season.

hits

Number of hits during the season. Includes singles, doubles, triples and homeruns.

doubles

Number of doubles hit.

triples

Number of triples hit.

homeruns

Homeruns by batters.

walks

Number of walks.

strikeouts_by_batters

Number of batters struckout.

stolen_bases

Number of stolen bases.

caught_stealing

Number of base runners caught stealing.

batters_hit_by_pitch

Number of batters hit by a pitch.

sacrifice_flies

Number of sacrifice flies.

opponents_runs_scored

Number of runs scored by opponents.

earned_runs_allowed

Number of earned runs allowed.

earned_run_average

Earned run average.

complete_games

Number of games where a single pitcher played the entire game.

shutouts

Number of shutouts.

saves

Number of saves.

outs_pitches

Number of outs pitched for the season (number of innings pitched times 3).

hits_allowed

Number of hits made by opponents.

homeruns_allowed

Number of homeruns hit by opponents.

walks_allowed

Number of opponents who were walked.

strikeouts_by_pitchers

Number of opponents who were struckout.

errors

Number of errors.

double_plays

Number of double plays.

fielding_percentage

Teams fielding percentage.

team_name

Full name of team.

ball_park

Home ballpark name.

home_attendance

Home attendance total.

Examples

library(dplyr)

# List the World Series winning teams for each year
mlb_teams %>%
  filter(world_series_winner == "Y") %>%
  select(year, team_name, ball_park)

# List the teams with their average number of wins and losses
mlb_teams %>%
  group_by(team_name) %>%
  summarize(mean_wins = mean(wins), mean_losses = mean(losses)) %>%
  arrange((team_name))