coins | 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)
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