car v1.0-8


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by John Fox

Companion to Applied Regression

This package accompanies J. Fox, An R and S-PLUS Companion to Applied Regression, Sage, 2002. The package contains mostly functions for applied regression, linear models, and generalized linear models, with an emphasis on regression diagnostics, particularly graphical diagnostic methods. There are also some utility functions. With some exceptions, I have tried not to duplicate capabilities in the basic distribution of R, nor in widely used packages. Some of the functions in car will use functions in the MASS package, if it is present; the subsets function graphs objects produced by the regsubsets function in the leaps package. Where relevant, the functions in car are consistent with na.action = na.omit or na.exclude.

Functions in car

Name Description
av.plots Added-Variable Plots
box.cox Box-Cox Family of Transformations
recode Recode a Variable
spread.level.plot Spread-Level Plots
Ask Change Argument to a Function Interactively
Cook's Distances Cook's Distances for Linear and Generalized Linear Models
ncv.test Score Test for Non-Constant Error Variance
durbin.watson Durbin-Watson Test for Autocorrelated Errors
ceres.plots Ceres Plots
Contrasts Functions to Construct Contrasts
Ellipses Ellipses, Data Ellipses, and Confidence Ellipses Panel Function Coplots
scatterplot Scatterplots with Boxplots
reg.line Plot Regression Line
cr.plots Component+Residual (Partial Residual) Plots
logit Logit Transformation
leverage.plots Regression Leverage Plots
Anova Anova Tables for Linear and Generalized Linear Models
scatterplot.matrix Scatterplot Matrices
subsets Plot Output from regsubsets Function in leaps package
qq.plot Quantile-Comparison Plots
Var Variance-Covariance Matrices (deprecated)
Transformation Axes Axes for Transformed Variables
box.cox.powers Multivariate Unconditional Box-Cox Transformations
box.tidwell Box-Tidwell Transformations
box.cox.var Constructed Variable for Box-Cox Transformation
vif Variance Inflation Factors
linear.hypothesis Test Linear Hypothesis
hccm Heteroscedasticity-Corrected Covariance Matrices
outlier.test Bonferroni Outlier Test
n.bins Number of Bins for Histogram
car-internal Internal car functions
which.names Position of Row Names
Cowles Cowles and Davis's Data on Volunteering
Burt Fraudulent Data on IQs of Twins Raised Apart
Chirot The 1907 Romanian Peasant Rebellion
Blackmoor Exercise Histories of Eating-Disordered and Control Subjects
US.pop Population of the United States
Florida Florida County Voting
Angell Moral Integration of American Cities
Greene Refugee Appeals
Ericksen The 1980 U.S. Census Undercount
Freedman Crowding and Crime in U. S. Metropolitan Areas
States Education and Related Statistics for the U.S. States
Robey Fertility and Contraception
Chile Voting Intentions in the 1988 Chilean Plebiscite
Womenlf Canadian Women's Labour-Force Participation
UN GDP and Infant Mortality
Ginzberg Data on Depression
Sahlins Agricultural Production in Mazulu Village
Prestige Prestige of Canadian Occupations
Can.pop Canadian Population Data
Quartet Four Regression Datasets
Hartnagel Canadian Crime-Rates Time Series
Ornstein Interlocking Directorates Among Major Canadian Firms
Duncan Duncan's Occupational Prestige Data
Leinhardt Data on Infant-Mortality
Anscombe U. S. State Public-School Expenditures
Baumann Methods of Teaching Reading Comprehension
Friendly Format Effects on Recall
Vocab Vocabulary and Education
Davis Self-Reports of Height and Weight
Bfox Canadian Women's Labour-Force Participation
Mroz U.S. Women's Labor-Force Participation
DavisThin Davis's Data on Drive for Thinness
Guyer Anonymity and Cooperation
Migration Canadian Interprovincial Migration Data
Mandel Contrived Collinear Data
SLID Survey of Labour and Income Dynamics
Adler Experimenter Expectations
Moore Status, Authoritarianism, and Conformity
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