# Sanford Weisberg

#### 6 packages on CRAN

This package is a companion to the textbook S. Weisberg (2005), "Applied Linear Regression," 3rd edition, Wiley. It includes all the data sets discussed in the book (except one), and a few functions that are tailored to the methods discussed in the book. As of version 2.0.0, this package depends on the car package. Many functions formerly in alr3 have been renamed and now reside in car. Data files have beeen lightly modified to make some data columns row labels.

This package is a companion to the textbook S. Weisberg (2014), "Applied Linear Regression," 4rd edition, Wiley. It includes all the data sets discussed in the book and one function to access the textbook's website. This package depends on the car package. Many data files in this package are included in the alr3 package as well, so only one of them should be loaded.

Functions, methods, and datasets for fitting dimension reduction regression, using slicing (methods SAVE and SIR), Principal Hessian Directions (phd, using residuals and the response), and an iterative IRE. Partial methods, that condition on categorical predictors are also available. A variety of tests, and stepwise deletion of predictors, is also included. Also included is code for computing permutation tests of dimension. Adding additional methods of estimating dimension is straightforward. For documentation, see the vignette in the package. With version 3.0.4, the arguments for dr.step have been modified.

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

Datasets to Accompany J. Fox and S. Weisberg, An R Companion to Applied Regression, Third Edition, Sage (forthcoming).

Graphical and tabular effect displays, e.g., of interactions, for various statistical models with linear predictors.