A Summary of the Cars93 Data set

Description

The Cars93.summary data frame has 6 rows and 4 columns created from information in the Cars93 data set in the Venables and Ripley MASS package. Each row corresponds to a different class of car (e.g. Compact, Large, etc.).

Usage

Cars93.summary

Format

This data frame contains the following columns:

Min.passengers

minimum passenger capacity for each class of car

Max.passengers

maximum passenger capacity for each class of car

No.of.cars

number of cars in each class

abbrev

a factor with levels C Compact, L Large, M Mid-Size, Sm Small, Sp Sporty, V Van

Source

Lock, R. H. (1993) 1993 New Car Data. Journal of Statistics Education 1(1)

References

MASS library

Examples

type <- Cars93.summary$abbrev
type <- Cars93.summary[,4]
type <- Cars93.summary[,"abbrev"]
type <- Cars93.summary[[4]] # Take the object that is stored
                            # in the fourth list element.
type
pause()

attach(Cars93.summary)
  # R can now access the columns of Cars93.summary directly
abbrev
detach("Cars93.summary")
pause()

#  To change the name of the \verb!abbrev! variable (the fourth column)
names(Cars93.summary)[4] <- "code"
pause()

#  To change all of the names, try
names(Cars93.summary) <- c("minpass","maxpass","number","code")