mpg: Data on automobile efficiency on town streets and highway.

Description

Fuel efficiency in miles per gallon for a variety of cars in the USA.

Usage

data(mpg)

Arguments

Format

A data frame listing fuel efficiency and other car characteristics including

symbol: Insurers measure of relative riskiness of car from -3 (safe) to 3 (risky)
loss: average insurance loss payment per insured vehicle per year.
hw.mpg: Fuel consumption on highway as miles per US gallon.
city.mpg: Fuel consumption in town as miles per US gallon.
make: Name of car maker.
fuel: 2 level factor. gas or diesel.
aspir: 2 level factor. std or turbo.
doors: 2 level factor. two or four.
style: Factor indicating style of car.
drive: 3 level factor indicating front, rear or all wheel drive: fwd, rwd or 4wd.
eng.loc: Engine location
wb: wheel base in inches
length: in inches
width: in inches
height: in inches
weight: in pounds
eng.type: Factor giving engine type
cylinders: Factor for number of cylinders
eng.cc: cubic capicity of engine in cubic inches.
fuel.sys: fuel system
bore: in inches
stroke: in inches
comp.ratio: compression ratio
hp: horse power
rpm: maximum RPM
price: in US dollars

Details

Data were collected by Jeffrey C. Schlimmer from 1) 1985 Model Import Car and Truck Specifications, 1985 Ward's Automotive Yearbook. 2) Personal Auto Manuals, Insurance Services Office, 160 Water Street, New York, NY 10038 3) Insurance Collision Report, Insurance Institute for Highway Safety, Watergate 600, Washington, DC 20037

References

Wood, S.N. (2006) Generalized Additive Models: An Introduction with R

Examples

Run this code

# NOT RUN {
require(gamair);require(mgcv)
data(mpg)
b <- gam(list(city.mpg~fuel+style+drive+s(weight)+s(hp)+s(make,bs="re"),
          hw.mpg~fuel+style+drive++s(weight)+s(hp)+s(make,bs="re")),
          family=mvn(d=2),data=mpg)
plot(b,pages=1,scheme=1)
# }

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