Yearly batting records for all major league baseball players

Source: R/data.r

This data frame contains batting statistics for a subset of players collected from http://www.baseball-databank.org/. There are a total of 21,699 records, covering 1,228 players from 1871 to 2007. Only players with more 15 seasons of play are included.

baseball

Format

A 21699 x 22 data frame

Variables

Variables:

  • id, unique player id

  • year, year of data

  • stint

  • team, team played for

  • lg, league

  • g, number of games

  • ab, number of times at bat

  • r, number of runs

  • h, hits, times reached base because of a batted, fair ball without error by the defense

  • X2b, hits on which the batter reached second base safely

  • X3b, hits on which the batter reached third base safely

  • hr, number of home runs

  • rbi, runs batted in

  • sb, stolen bases

  • cs, caught stealing

  • bb, base on balls (walk)

  • so, strike outs

  • ibb, intentional base on balls

  • hbp, hits by pitch

  • sh, sacrifice hits

  • sf, sacrifice flies

  • gidp, ground into double play

References

http://www.baseball-databank.org/

Examples

baberuth <- subset(baseball, id == "ruthba01")
baberuth$cyear <- baberuth$year - min(baberuth$year) + 1

calculate_cyear <- function(df) {
  mutate(df,
    cyear = year - min(year),
    cpercent = cyear / (max(year) - min(year))
  )
}

baseball <- ddply(baseball, .(id), calculate_cyear)
baseball <- subset(baseball, ab >= 25)

model <- function(df) {
  lm(rbi / ab ~ cyear, data=df)
}
model(baberuth)
#> 
#> Call:
#> lm(formula = rbi/ab ~ cyear, data = df)
#> 
#> Coefficients:
#> (Intercept)        cyear  
#>    0.203200     0.003413  
#> 
models <- dlply(baseball, .(id), model)