# Companion to Applied Regression

## Documentation for package ‘car’ version 2.1-6

- DESCRIPTION file.
- User guides, package vignettes and other documentation.
- Package NEWS.

## Help Pages

A B C D E F G H I K L M N O P Q R S T U V W Y misc

car-package | Companion to Applied Regression

## -- A --

adaptiveKernel | Nonparametric Density Estimates
Adler | Experimenter Expectations
AMSsurvey | American Math Society Survey Data
Angell | Moral Integration of American Cities
Anova | Anova Tables for Various Statistical Models
Anova.aov | Anova Tables for Various Statistical Models
Anova.coxme | Anova Tables for Various Statistical Models
Anova.coxph | Anova Tables for Various Statistical Models
Anova.default | Anova Tables for Various Statistical Models
Anova.glm | Anova Tables for Various Statistical Models
Anova.lm | Anova Tables for Various Statistical Models
Anova.lme | Anova Tables for Various Statistical Models
Anova.manova | Anova Tables for Various Statistical Models
Anova.mer | Anova Tables for Various Statistical Models
Anova.merMod | Anova Tables for Various Statistical Models
Anova.mlm | Anova Tables for Various Statistical Models
Anova.multinom | Anova Tables for Various Statistical Models
Anova.polr | Anova Tables for Various Statistical Models
Anova.rlm | Anova Tables for Various Statistical Models
Anova.svyglm | Anova Tables for Various Statistical Models
Anscombe | U. S. State Public-School Expenditures
as.data.frame.univaov | Anova Tables for Various Statistical Models
av.plot | Deprecated Functions in car Package
av.plots | Deprecated Functions in car Package
avp | Added-Variable Plots
avPlot | Added-Variable Plots
avPlot.glm | Added-Variable Plots
avPlot.lm | Added-Variable Plots
avPlots | Added-Variable Plots

## -- B --

basicPower | Box-Cox, Box-Cox with Negatives Allowed, Yeo-Johnson and Basic Power Transformations
basicPowerAxis | Axes for Transformed Variables
Baumann | Methods of Teaching Reading Comprehension
bc | Deprecated Functions in car Package
bcnPower | Box-Cox, Box-Cox with Negatives Allowed, Yeo-Johnson and Basic Power Transformations
bcPower | Box-Cox, Box-Cox with Negatives Allowed, Yeo-Johnson and Basic Power Transformations
bcPowerAxis | Axes for Transformed Variables
Bfox | Canadian Women's Labour-Force Participation
Blackmore | Exercise Histories of Eating-Disordered and Control Subjects
Boot | Bootstrapping for regression models
Boot.default | Bootstrapping for regression models
Boot.glm | Bootstrapping for regression models
Boot.lm | Bootstrapping for regression models
Boot.nls | Bootstrapping for regression models
box.cox | Deprecated Functions in car Package
box.cox.powers | Deprecated Functions in car Package
box.cox.var | Deprecated Functions in car Package
box.tidwell | Deprecated Functions in car Package
boxCox | Graph the profile log-likelihood for Box-Cox transformations in 1D or in 2D with the bcnPower family.
boxCox.bcnPowerTransform | Graph the profile log-likelihood for Box-Cox transformations in 1D or in 2D with the bcnPower family.
boxCox.default | Graph the profile log-likelihood for Box-Cox transformations in 1D or in 2D with the bcnPower family.
boxCox.formula | Graph the profile log-likelihood for Box-Cox transformations in 1D or in 2D with the bcnPower family.
boxCox.lm | Graph the profile log-likelihood for Box-Cox transformations in 1D or in 2D with the bcnPower family.
boxCox2d | Graph the profile log-likelihood for Box-Cox transformations in 1D or in 2D with the bcnPower family.
boxCoxVariable | Constructed Variable for Box-Cox Transformation
Boxplot | Boxplots With Point Identification
Boxplot.data.frame | Boxplots With Point Identification
Boxplot.default | Boxplots With Point Identification
Boxplot.formula | Boxplots With Point Identification
Boxplot.list | Boxplots With Point Identification
Boxplot.matrix | Boxplots With Point Identification
boxTidwell | Box-Tidwell Transformations
boxTidwell.default | Box-Tidwell Transformations
boxTidwell.formula | Box-Tidwell Transformations
Burt | Fraudulent Data on IQs of Twins Raised Apart

## -- C --

CanPop | Canadian Population Data
car | Companion to Applied Regression
car-deprecated | Deprecated Functions in car Package
car-internal.Rd | Internal Objects for the 'car' package
carWeb | Access to the R Companion to Applied Regression website
ceres.plot | Deprecated Functions in car Package
ceres.plots | Deprecated Functions in car Package
ceresPlot | Ceres Plots
ceresPlot.glm | Ceres Plots
ceresPlot.lm | Ceres Plots
ceresPlots | Ceres Plots
Chile | Voting Intentions in the 1988 Chilean Plebiscite
Chirot | The 1907 Romanian Peasant Rebellion
compareCoefs | Print estimated coefficients and their standard errors in a table for several regression models.
confidence.ellipse | Deprecated Functions in car Package
confidenceEllipse | Ellipses, Data Ellipses, and Confidence Ellipses
confidenceEllipse.default | Ellipses, Data Ellipses, and Confidence Ellipses
confidenceEllipse.glm | Ellipses, Data Ellipses, and Confidence Ellipses
confidenceEllipse.lm | Ellipses, Data Ellipses, and Confidence Ellipses
confint.boot | Methods Functions to Support 'boot' Objects
contr.Helmert | Functions to Construct Contrasts
contr.Sum | Functions to Construct Contrasts
contr.Treatment | Functions to Construct Contrasts
Contrasts | Functions to Construct Contrasts
cookd | Deprecated Functions in car Package
Cowles | Cowles and Davis's Data on Volunteering
cr.plot | Deprecated Functions in car Package
cr.plots | Deprecated Functions in car Package
crp | Component+Residual (Partial Residual) Plots
crPlot | Component+Residual (Partial Residual) Plots
crPlot.lm | Component+Residual (Partial Residual) Plots
crPlots | Component+Residual (Partial Residual) Plots

## -- D --

data.ellipse | Deprecated Functions in car Package
dataEllipse | Ellipses, Data Ellipses, and Confidence Ellipses
Davis | Self-Reports of Height and Weight
DavisThin | Davis's Data on Drive for Thinness
deltaMethod | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.coxph | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.default | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.lm | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.lme | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.lmList | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.mer | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.merMod | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.multinom | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.nls | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.polr | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
deltaMethod.survreg | Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
densityPlot | Nonparametric Density Estimates
densityPlot.default | Nonparametric Density Estimates
densityPlot.formula | Nonparametric Density Estimates
Depredations | Minnesota Wolf Depredation Data
dfbetaPlots | dfbeta and dfbetas Index Plots
dfbetaPlots.lm | dfbeta and dfbetas Index Plots
dfbetasPlots | dfbeta and dfbetas Index Plots
dfbetasPlots.lm | dfbeta and dfbetas Index Plots
Duncan | Duncan's Occupational Prestige Data
durbin.watson | Deprecated Functions in car Package
durbinWatsonTest | Durbin-Watson Test for Autocorrelated Errors
durbinWatsonTest.default | Durbin-Watson Test for Autocorrelated Errors
durbinWatsonTest.lm | Durbin-Watson Test for Autocorrelated Errors
dwt | Durbin-Watson Test for Autocorrelated Errors

## -- E --

ellipse | Ellipses, Data Ellipses, and Confidence Ellipses
Ericksen | The 1980 U.S. Census Undercount

## -- F --

Florida | Florida County Voting
Freedman | Crowding and Crime in U. S. Metropolitan Areas
Friendly | Format Effects on Recall

## -- G --

gamLine | Smoothers to Draw Lines on Scatterplots
Ginzberg | Data on Depression
Greene | Refugee Appeals
Guyer | Anonymity and Cooperation

## -- H --

Hartnagel | Canadian Crime-Rates Time Series
hccm | Heteroscedasticity-Corrected Covariance Matrices
hccm.default | Heteroscedasticity-Corrected Covariance Matrices
hccm.lm | Heteroscedasticity-Corrected Covariance Matrices
Highway1 | Highway Accidents
hist.boot | Methods Functions to Support 'boot' Objects

## -- I --

Identify3d | Three-Dimensional Scatterplots and Point Identification
infIndexPlot | Influence Index Plot
infIndexPlot.lm | Influence Index Plot
influence.plot | Regression Influence Plot
influenceIndexPlot | Influence Index Plot
influencePlot | Regression Influence Plot
influencePlot.lm | Regression Influence Plot
inverseResponsePlot | Inverse Response Plots to Transform the Response
inverseResponsePlot.lm | Inverse Response Plots to Transform the Response
invResPlot | Inverse Response Plots to Transform the Response
invTranEstimate | Choose a Predictor Transformation Visually or Numerically
invTranPlot | Choose a Predictor Transformation Visually or Numerically
invTranPlot.default | Choose a Predictor Transformation Visually or Numerically
invTranPlot.formula | Choose a Predictor Transformation Visually or Numerically

## -- K --

KosteckiDillon | Treatment of Migraine Headaches

## -- L --

Leinhardt | Data on Infant-Mortality
levene.test | Deprecated Functions in car Package
leveneTest | Levene's Test
leveneTest.default | Levene's Test
leveneTest.formula | Levene's Test
leveneTest.lm | Levene's Test
leverage.plot | Deprecated Functions in car Package
leverage.plots | Deprecated Functions in car Package
leveragePlot | Regression Leverage Plots
leveragePlot.glm | Regression Leverage Plots
leveragePlot.lm | Regression Leverage Plots
leveragePlots | Regression Leverage Plots
lht | Test Linear Hypothesis
linear.hypothesis | Deprecated Functions in car Package
linearHypothesis | Test Linear Hypothesis
linearHypothesis.default | Test Linear Hypothesis
linearHypothesis.glm | Test Linear Hypothesis
linearHypothesis.lm | Test Linear Hypothesis
linearHypothesis.lme | Test Linear Hypothesis
linearHypothesis.mer | Test Linear Hypothesis
linearHypothesis.merMod | Test Linear Hypothesis
linearHypothesis.mlm | Test Linear Hypothesis
linearHypothesis.nlsList | Test Linear Hypothesis
linearHypothesis.polr | Test Linear Hypothesis
linearHypothesis.rlm | Test Linear Hypothesis
linearHypothesis.svyglm | Test Linear Hypothesis
LoBD | Cancer drug data use to provide an example of the use of the skew power distributions.
loessLine | Smoothers to Draw Lines on Scatterplots
logit | Logit Transformation

## -- M --

makeHypothesis | Test Linear Hypothesis
Mandel | Contrived Collinear Data
Manova | Anova Tables for Various Statistical Models
Manova.mlm | Anova Tables for Various Statistical Models
marginalModelPlot | Marginal Model Plotting
marginalModelPlots | Marginal Model Plotting
matchCoefs | Test Linear Hypothesis
matchCoefs.default | Test Linear Hypothesis
matchCoefs.lme | Test Linear Hypothesis
matchCoefs.mer | Test Linear Hypothesis
matchCoefs.merMod | Test Linear Hypothesis
matchCoefs.mlm | Test Linear Hypothesis
mcPlot | Draw Linear Model Marginal and Conditional Plots in Parallel or Overlaid
mcPlot.lm | Draw Linear Model Marginal and Conditional Plots in Parallel or Overlaid
mcPlots | Draw Linear Model Marginal and Conditional Plots in Parallel or Overlaid
Migration | Canadian Interprovincial Migration Data
mmp | Marginal Model Plotting
mmp.default | Marginal Model Plotting
mmp.glm | Marginal Model Plotting
mmp.lm | Marginal Model Plotting
mmps | Marginal Model Plotting
Moore | Status, Authoritarianism, and Conformity
Mroz | U.S. Women's Labor-Force Participation

## -- N --

ncv.test | Deprecated Functions in car Package
ncvTest | Score Test for Non-Constant Error Variance
ncvTest.glm | Score Test for Non-Constant Error Variance
ncvTest.lm | Score Test for Non-Constant Error Variance

## -- O --

OBrienKaiser | O'Brien and Kaiser's Repeated-Measures Data
Ornstein | Interlocking Directorates Among Major Canadian Firms
outlier.test | Deprecated Functions in car Package
outlierTest | Bonferroni Outlier Test
outlierTest.glm | Bonferroni Outlier Test
outlierTest.lm | Bonferroni Outlier Test

## -- P --

panel.car | Panel Function for Coplots
plot.powerTransform | plot Method for powerTransform Objects
Pottery | Chemical Composition of Pottery
powerTransform | Finding Univariate or Multivariate Power Transformations
powerTransform.default | Finding Univariate or Multivariate Power Transformations
powerTransform.formula | Finding Univariate or Multivariate Power Transformations
powerTransform.lm | Finding Univariate or Multivariate Power Transformations
powerTransform.lmerMod | Finding Univariate or Multivariate Power Transformations
Prestige | Prestige of Canadian Occupations
print.Anova.mlm | Anova Tables for Various Statistical Models
print.boxTidwell | Box-Tidwell Transformations
print.durbinWatsonTest | Durbin-Watson Test for Autocorrelated Errors
print.linearHypothesis.mlm | Test Linear Hypothesis
print.outlierTest | Bonferroni Outlier Test
print.spreadLevelPlot | Spread-Level Plots
print.summary.Anova.mlm | Anova Tables for Various Statistical Models
print.univaov | Anova Tables for Various Statistical Models
printHypothesis | Test Linear Hypothesis
probabilityAxis | Axes for Transformed Variables

## -- Q --

qq.plot | Deprecated Functions in car Package
qqp | Quantile-Comparison Plots
qqPlot | Quantile-Comparison Plots
qqPlot.default | Quantile-Comparison Plots
qqPlot.glm | Quantile-Comparison Plots
qqPlot.lm | Quantile-Comparison Plots
quantregLine | Smoothers to Draw Lines on Scatterplots
Quartet | Four Regression Datasets

## -- R --

Recode | Recode a Variable
recode | Recode a Variable
regLine | Plot Regression Line
residCurvTest | Residual Plots and Curvature Tests for Linear Model Fits
residCurvTest.glm | Residual Plots and Curvature Tests for Linear Model Fits
residCurvTest.lm | Residual Plots and Curvature Tests for Linear Model Fits
residualPlot | Residual Plots and Curvature Tests for Linear Model Fits
residualPlot.default | Residual Plots and Curvature Tests for Linear Model Fits
residualPlot.glm | Residual Plots and Curvature Tests for Linear Model Fits
residualPlot.lm | Residual Plots and Curvature Tests for Linear Model Fits
residualPlots | Residual Plots and Curvature Tests for Linear Model Fits
residualPlots.default | Residual Plots and Curvature Tests for Linear Model Fits
residualPlots.glm | Residual Plots and Curvature Tests for Linear Model Fits
residualPlots.lm | Residual Plots and Curvature Tests for Linear Model Fits
Robey | Fertility and Contraception

## -- S --

Sahlins | Agricultural Production in Mazulu Village
Salaries | Salaries for Professors
scatter3d | Three-Dimensional Scatterplots and Point Identification
scatter3d.default | Three-Dimensional Scatterplots and Point Identification
scatter3d.formula | Three-Dimensional Scatterplots and Point Identification
scatterplot | Scatterplots with Boxplots
scatterplot.default | Scatterplots with Boxplots
scatterplot.formula | Scatterplots with Boxplots
scatterplot.matrix | Deprecated Functions in car Package
scatterplotMatrix | Scatterplot Matrices
scatterplotMatrix.default | Scatterplot Matrices
scatterplotMatrix.formula | Scatterplot Matrices
ScatterplotSmoothers | Smoothers to Draw Lines on Scatterplots
showLabels | Utility Functions to Identify and Mark Extreme Points in a 2D Plot.
sigmaHat | Return the scale estimate for a regression model
sigmaHat.default | Return the scale estimate for a regression model
sigmaHat.glm | Return the scale estimate for a regression model
sigmaHat.lm | Return the scale estimate for a regression model
SLID | Survey of Labour and Income Dynamics
slp | Spread-Level Plots
Soils | Soil Compositions of Physical and Chemical Characteristics
some | Sample a Few Elements of an Object
some.data.frame | Sample a Few Elements of an Object
some.default | Sample a Few Elements of an Object
some.matrix | Sample a Few Elements of an Object
sp | Scatterplots with Boxplots
spm | Scatterplot Matrices
spread.level.plot | Deprecated Functions in car Package
spreadLevelPlot | Spread-Level Plots
spreadLevelPlot.default | Spread-Level Plots
spreadLevelPlot.formula | Spread-Level Plots
spreadLevelPlot.lm | Spread-Level Plots
States | Education and Related Statistics for the U.S. States
subsets | Plot Output from regsubsets Function in leaps package
subsets.regsubsets | Plot Output from regsubsets Function in leaps package
summary.Anova.mlm | Anova Tables for Various Statistical Models
summary.boot | Methods Functions to Support 'boot' Objects
symbox | Boxplots for transformations to symmetry
symbox.default | Boxplots for transformations to symmetry
symbox.formula | Boxplots for transformations to symmetry

## -- T --

testTransform | Likelihood-Ratio Tests for Univariate or Multivariate Power Transformations to Normality
testTransform.bcnPowerTransformlmer | Likelihood-Ratio Tests for Univariate or Multivariate Power Transformations to Normality
testTransform.lmerModpowerTransform | Likelihood-Ratio Tests for Univariate or Multivariate Power Transformations to Normality
testTransform.powerTransform | Likelihood-Ratio Tests for Univariate or Multivariate Power Transformations to Normality
Transact | Transaction data
tukeyNonaddTest | Residual Plots and Curvature Tests for Linear Model Fits

## -- U --

UN | GDP and Infant Mortality
USPop | Population of the United States

## -- V --

vcov.boot | Methods Functions to Support 'boot' Objects
vif | Variance Inflation Factors
vif.default | Variance Inflation Factors
Vocab | Vocabulary and Education

## -- W --

wcrossprod | Weighted Matrix Crossproduct
WeightLoss | Weight Loss Data
which.names | Position of Row Names
whichNames | Position of Row Names
Womenlf | Canadian Women's Labour-Force Participation
Wong | Post-Coma Recovery of IQ
Wool | Wool data

## -- Y --

yjPower | Box-Cox, Box-Cox with Negatives Allowed, Yeo-Johnson and Basic Power Transformations
yjPowerAxis | Axes for Transformed Variables

## -- misc --

.carEnv | Internal Objects for the 'car' package