Cars93.summary {DAAG} | R Documentation |
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")
[Package DAAG version 1.25.6 Index]