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car (version 3.1-5)

Companion to Applied Regression

Description

Functions to Accompany J. Fox and S. Weisberg, An R Companion to Applied Regression, Third Edition, Sage, 2019.

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Install

install.packages('car')

Monthly Downloads

419,564

Version

3.1-5

License

GPL (>= 2)

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Maintainer

Brad Price

Last Published

February 3rd, 2026

Functions in car (3.1-5)

Tapply

Apply a Function to a Variable Within Factor Levels
boxCox

Graph the profile log-likelihood for Box-Cox transformations in 1D, or in 2D with the bcnPower family.
car-defunct

Defunct Functions in the car Package
car-deprecated

Deprecated Functions in the car Package
TransformationAxes

Axes for Transformed Variables
boxCoxVariable

Constructed Variable for Box-Cox Transformation
bcPower

Box-Cox, Box-Cox with Negatives Allowed, Yeo-Johnson and Basic Power Transformations
avPlots

Added-Variable Plots
boxTidwell

Box-Tidwell Transformations
carPalette

Set or Retrieve car Package Color Palette
carWeb

Access to the R Companion to Applied Regression Website
brief

Print Abbreviated Ouput
densityPlot

Nonparametric Density Estimates
ceresPlots

Ceres Plots
compareCoefs

Print estimated coefficients and their standard errors in a table for several regression models.
carHexsticker

View the Official Hex Sticker for the car Package
car-internal.Rd

Internal Objects for the car package
dfbetaPlots

dfbeta and dfbetas Index Plots
deltaMethod

Estimate and Standard Error of a Nonlinear Function of Estimated Regression Coefficients
crPlots

Component+Residual (Partial Residual) Plots
invTranPlot

Choose a Predictor Transformation Visually or Numerically
influence.mixed.models

Influence Diagnostics for Mixed-Effects Models
leveneTest

Levene's Test
influencePlot

Regression Influence Plot
hccm

Heteroscedasticity-Corrected Covariance Matrices
hist.boot

Methods Functions to Support boot Objects
durbinWatsonTest

Durbin-Watson Test for Autocorrelated Errors
leveragePlots

Regression Leverage Plots
infIndexPlot

Influence Index Plot
invResPlot

Inverse Response Plots to Transform the Response
powerTransform

Finding Univariate or Multivariate Power Transformations
mmps

Marginal Model Plotting
logit

Logit Transformation
pointLabel

Label placement for points to avoid overlaps
outlierTest

Bonferroni Outlier Test
panel.car

Panel Function for Coplots
poTest

Test for Proportional Odds in the Proportional-Odds Logistic-Regression Model
linearHypothesis

Test Linear Hypothesis
mcPlots

Draw Linear Model Marginal and Conditional Plots in Parallel or Overlaid
ncvTest

Score Test for Non-Constant Error Variance
qqPlot

Quantile-Comparison Plot
recode

Recode a Variable
regLine

Plot Regression Line
scatterplot

Enhanced Scatterplots with Marginal Boxplots, Point Marking, Smoothers, and More
scatterplotMatrix

Scatterplot Matrices
some

Sample a Few Elements of an Object
scatter3d

Three-Dimensional Scatterplots and Point Identification
showLabels

Functions to Identify and Mark Extreme Points in a 2D Plot.
residualPlots

Residual Plots for Linear and Generalized Linear Models
sigmaHat

Return the scale estimate for a regression model
spreadLevelPlot

Spread-Level Plots
vif

Variance Inflation Factors
whichNames

Position of Row Names
strings2factors

Convert Character-String Variables in a Data Frame to Factors
testTransform

Likelihood-Ratio Tests for Univariate or Multivariate Power Transformations to Normality
wcrossprod

Weighted Matrix Crossproduct
subsets

Plot Output from regsubsets Function in leaps package
symbox

Boxplots for transformations to symmetry
Boot

Bootstrapping for regression models
Predict

Model Predictions
Export

Export a data frame to disk in one of many formats
Import

Import data from many file formats
Boxplot

Boxplots With Point Identification
ScatterplotSmoothers

Smoothers to Draw Lines on Scatterplots
Contrasts

Functions to Construct Contrasts
S

Modified Functions for Summarizing Linear, Generalized Linear, and Some Other Models
Anova

Anova Tables for Various Statistical Models
Ellipses

Ellipses, Data Ellipses, and Confidence Ellipses