Multidimensional Scaling R package smacof version 2.1-7 CRAN Task View: Psychometrics (https://CRAN.R-project.org/view=Psychometrics) Implements the following approaches for multidimensional scaling (MDS) based on stress minimization using majorization (smacof): ratio/interval/ordinal/spline MDS on symmetric dissimilarity matrices, MDS with external constraints on the configuration, individual differences scaling (idioscal, indscal), MDS with spherical restrictions, and ratio/interval/ordinal/spline unfolding (circular restrictions, row-conditional). Various tools and extensions like jackknife MDS, bootstrap MDS, permutation tests, MDS biplots, gravity models, unidimensional scaling, drift vectors (asymmetric MDS), classical scaling, and Procrustes are implemented as well. Software Depends: R (>= 3.5.0), plotrix, colorspace, e1071 Imports: graphics, stats, polynom, Hmisc, nnls, grDevices, MASS, weights, ellipse, wordcloud, parallel, foreach, doParallel Suggests: knitr, prefmod, MPsychoR, calibrate, ggplot2, rmarkdown Patrick Mair <mair@fas.harvard.edu> Comprehensive R Archive Network (CRAN) Patrick Mair [aut, cre], Jan De Leeuw [aut], Patrick J. F. Groenen [aut], Ingwer Borg [ctb] GPL-3 2024-10-10 application/tgz https://CRAN.R-project.org/package=smacof doi:10.32614/CRAN.package.smacof