ManagersHalf {Lahman}

ManagersHalf table

Description

Split season data for managers

Usage

data(ManagersHalf)

Format

A data frame with 93 observations on the following 10 variables.

playerID

Manager (player) ID code

yearID

Year

teamID

Team; a factor

lgID

League; a factor with levels AL NL

inseason

Managerial order. One if the individual managed the team the entire year. Otherwise denotes where the manager appeared in the managerial order (1 for first manager, 2 for second, etc.). A factor with levels 1 2 3 4 5

half

First or second half of season

G

Games managed

W

Wins

L

Losses

rank

Team's position in standings for the half

Source

Lahman, S. (2023) Lahman's Baseball Database, 1871-2022, 2022 version, https://www.seanlahman.com/baseball-archive/statistics/

Examples

library("dplyr")
library("reshape2")

# Only have data for 1892 and 1981

# League rank by half for 1981 teams with the same
# manager in both halves who were hired in-season
ManagersHalf %>% 
  filter(yearID >= 1901) %>%
  group_by(teamID, yearID) %>%
  filter(all(playerID == playerID[1])) %>%  # same manager in both halves
  mutate(winPct = round(W/G, 3)) %>%
  reshape2::dcast(playerID + yearID + teamID + lgID ~ half,
                     value.var = "rank") %>%
  rename(rank1 = `1`, rank2 = `2`)