These functions display a generalization, due to Sall (1990) and Cook and Weisberg (1991), of added-variable plots to multiple-df terms in a linear model. When a term has just 1 df, the leverage plot is a rescaled version of the usual added-variable (partial-regression) plot.
Computes and optionally plots profile log-likelihoods for the parameter of the Box-Cox power family, the Yeo-Johnson power family, or for either of the parameters in a skew power family. This is a slight generalization of the boxcox function in the MASS package that allows for families of transformations other than the Box-Cox power family.
Generic function for testing a linear hypothesis, and methods for linear models, generalized linear models, multivariate linear models, linear and generalized linear mixed-effects models, generalized linear models fit with svyglm in the survey package, robust linear models fit with rlm in the MASS package, and other models that have methods for coef and vcov. For mixed-effects models, the tests are Wald chi-square tests for the fixed effects.
Boxplot is a wrapper for the standard Rboxplot function, providing point identification, axis labels, and a formula interface for boxplots without a grouping variable.
These functions are provided for compatibility with older versions of the car package only, and may be removed eventually. Commands that worked in versions of the car package prior to version 2.0-0 will not necessarily work in version 2.0-0 and beyond, or may not work in the same manner.
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