coins {UsingR} | R Documentation |
The coins in author's change bin with year and value.
data(coins)
A data frame with 371 observations on the following 2 variables.
Year of coin
Value of coin: quarter, dime, nickel, or penny
data(coins)
years = cut(coins$year,seq(1920,2010,by=10),include.lowest=TRUE,
labels = paste(192:200,"*",sep=""))
table(years)