car90: Automobile Data from 'Consumer Reports' 1990

Description

Data on 111 cars, taken from pages 235--255, 281--285 and 287--288 of the April 1990 Consumer Reports Magazine.

Usage

data(car90)

Arguments

Format

The data frame contains the following columns

Country: a factor giving the country in which the car was manufactured
Disp: engine displacement in cubic inches
Disp2: engine displacement in liters
Eng.Rev: engine revolutions per mile, or engine speed at 60 mph
Front.Hd: distance between the car's head-liner and the head of a 5 ft. 9 in. front seat passenger, in inches, as measured by CU
Frt.Leg.Room: maximum front leg room, in inches, as measured by CU
Frt.Shld: front shoulder room, in inches, as measured by CU
Gear.Ratio: the overall gear ratio, high gear, for manual transmission
Gear2: the overall gear ratio, high gear, for automatic transmission
HP: net horsepower
HP.revs: the red line---the maximum safe engine speed in rpm
Height: height of car, in inches, as supplied by manufacturer
Length: overall length, in inches, as supplied by manufacturer
Luggage: luggage space
Mileage: a numeric vector of gas mileage in miles/gallon as tested by CU; contains NAs.
Model2: alternate name, if the car was sold under two labels
Price: list price with standard equipment, in dollars
Rear.Hd: distance between the car's head-liner and the head of a 5 ft 9 in. rear seat passenger, in inches, as measured by CU
Rear.Seating: rear fore-and-aft seating room, in inches, as measured by CU
RearShld: rear shoulder room, in inches, as measured by CU
Reliability: an ordered factor with levels Much worse < worse < average < better < Much better: contains NAs.
Rim: factor giving the rim size
Sratio.m: Number of turns of the steering wheel required for a turn of 30 foot radius, manual steering
Sratio.p: Number of turns of the steering wheel required for a turn of 30 foot radius, power steering
Steering: steering type offered: manual, power, or both
Tank: fuel refill capacity in gallons
Tires: factor giving tire size
Trans1: manual transmission, a factor with levels , man.4, man.5 and man.6
Trans2: automatic transmission, a factor with levels , auto.3, auto.4, and auto.CVT. No car is missing both the manual and automatic transmission variables, but several had both as options
Turning: the radius of the turning circle in feet
Type: a factor giving the general type of car. The levels are: Small, Sporty, Compact, Medium, Large, Van
Weight: an order statistic giving the relative weights of the cars; 1 is the lightest and 111 is the heaviest
Wheel.base: length of wheelbase, in inches, as supplied by manufacturer
Width: width of car, in inches, as supplied by manufacturer

Source

This is derived (with permission) from the data set car.all in S-PLUS, but with some further clean up of variable names and definitions.

Examples

Run this code

data(car90)
plot(car90$Price/1000, car90$Weight,
     xlab = "Price (thousands)", ylab = "Weight (lbs)")
mlowess <- function(x, y, ...) {
    keep <- !(is.na(x) | is.na(y))
    lowess(x[keep], y[keep], ...)
}
with(car90, lines(mlowess(Price/1000, Weight, f = 0.5)))