Gifi Methods for Optimal Scaling CRAN Task View: ChemPhys (http://CRAN.R-project.org/view=ChemPhys) CRAN Task View: Multivariate (http://CRAN.R-project.org/view=Multivariate) CRAN Task View: Psychometrics (http://CRAN.R-project.org/view=Psychometrics) This package performs a homogeneity analysis and various extensions. Rank restrictions on the category quantifications can be imposed (nonlinear PCA). The categories are transformed by means of optimal scaling with options for nominal, ordinal, and numerical scale levels (for rank-1 restrictions). Variables can be grouped into sets, in order to emulate regression analysis and canonical correlation analysis. Software Depends: rgl, ape, scatterplot3d Imports: graphics, stats Jan de Leeuw <deleeuw@ucla.edu> Jan de Leeuw, Patrick Mair GPL 2010-08-25 application/tgz http://CRAN.R-project.org/package=homals