twoway: Analysis of Two-Way Tables

Carries out analyses of two-way tables with one observation per cell, together with graphical displays for an additive fit and a diagnostic plot for removable 'non-additivity' via a power transformation of the response. It implements methods from Tukey's Exploratory Data Analysis (1973) <ISBN: 978-0201076165>, including a 1-degree-of-freedom test for row*column 'non-additivity', linear in the row and column effects.

Getting started

Package details

AuthorMichael Friendly [aut, cre] (ORCID: <https://orcid.org/0000-0002-3237-0941>), Richard M. Heiberger [aut], John Fox [ctb]
MaintainerMichael Friendly <friendly@yorku.ca>
LicenseGPL-3
Version0.7.0
URL https://friendly.github.io/twoway/ https://github.com/friendly/twoway
Package repositoryView on CRAN
Installation Install the latest version of this package by entering the following in R:
install.packages("twoway")

Try the twoway package in your browser

Any scripts or data that you put into this service are public.

twoway documentation built on July 21, 2026, 5:09 p.m.