imports85: The Automobile Data

In iRF: iterative Random Forests

Description

This is the ‘Automobile’ data from the UCI Machine Learning Repository.

Usage

data(imports85)

Format

imports85 is a data frame with 205 cases (rows) and 26 variables (columns). This data set consists of three types of entities: (a) the specification of an auto in terms of various characteristics, (b) its assigned insurance risk rating, (c) its normalized losses in use as compared to other cars. The second rating corresponds to the degree to which the auto is more risky than its price indicates. Cars are initially assigned a risk factor symbol associated with its price. Then, if it is more risky (or less), this symbol is adjusted by moving it up (or down) the scale. Actuarians call this process ‘symboling’. A value of +3 indicates that the auto is risky, -3 that it is probably pretty safe.

The third factor is the relative average loss payment per insured vehicle year. This value is normalized for all autos within a particular size classification (two-door small, station wagons, sports/speciality, etc...), and represents the average loss per car per year.

Author(s)

Andy Liaw

Source

Originally created by Jeffrey C. Schlimmer, from 1985 Model Import Car and Truck Specifications, 1985 Ward's Automotive Yearbook, Personal Auto Manuals, Insurance Services Office, and Insurance Collision Report, Insurance Institute for Highway Safety.

The original data is at http://www.ics.uci.edu/~mlearn/MLSummary.html.

References

1985 Model Import Car and Truck Specifications, 1985 Ward's Automotive Yearbook.

Personal Auto Manuals, Insurance Services Office, 160 Water Street, New York, NY 10038

Insurance Collision Report, Insurance Institute for Highway Safety, Watergate 600, Washington, DC 20037

See Also

randomForest

Examples

data(imports85)
head(imports85)

Example output

iRF 2.0.0
  symboling normalizedLosses        make fuelType aspiration numOfDoors
1         3               NA alfa-romero      gas        std        two
2         3               NA alfa-romero      gas        std        two
3         1               NA alfa-romero      gas        std        two
4         2              164        audi      gas        std       four
5         2              164        audi      gas        std       four
6         2               NA        audi      gas        std        two
    bodyStyle driveWheels engineLocation wheelBase length width height
1 convertible         rwd          front      88.6  168.8  64.1   48.8
2 convertible         rwd          front      88.6  168.8  64.1   48.8
3   hatchback         rwd          front      94.5  171.2  65.5   52.4
4       sedan         fwd          front      99.8  176.6  66.2   54.3
5       sedan         4wd          front      99.4  176.6  66.4   54.3
6       sedan         fwd          front      99.8  177.3  66.3   53.1
  curbWeight engineType numOfCylinders engineSize fuelSystem bore stroke
1       2548       dohc           four        130       mpfi 3.47   2.68
2       2548       dohc           four        130       mpfi 3.47   2.68
3       2823       ohcv            six        152       mpfi 2.68   3.47
4       2337        ohc           four        109       mpfi 3.19   3.40
5       2824        ohc           five        136       mpfi 3.19   3.40
6       2507        ohc           five        136       mpfi 3.19   3.40
  compressionRatio horsepower peakRpm cityMpg highwayMpg price
1              9.0        111    5000      21         27 13495
2              9.0        111    5000      21         27 16500
3              9.0        154    5000      19         26 16500
4             10.0        102    5500      24         30 13950
5              8.0        115    5500      18         22 17450
6              8.5        110    5500      19         25 15250

iRF documentation built on May 2, 2019, 11:02 a.m.