[R-pkgs] smacof package for multidimensional scaling

Patrick Mair patrick.mair at wu-wien.ac.at
Thu Jun 5 19:04:40 CEST 2008

Dear UserR's,

The smacof package (see also our PsychoR repository on 
http://r-forge.r-project.org/projects/psychor/) is uploaded on CRAN.

This package provides the following approaches of multidimensional 
scaling (MDS) based on stress minimization by means of majorization 
(smacof): - Simple smacof on symmetric dissimilarity matrices
- smacof for rectangular matrices (unfolding models)
- smacof with constraints on the configuration (linear, unique, 
diagonal, or user-specified constraints; fitting simplex or circumplex)
- 3-way smacof for individual differences (including constraints for 
idioscal, indscal, and identity)
- Sphere projections (spherical smacof, primal and dual algorithm).

Each of these approaches is implemented in a metric and nonmetric manner 
including primary, secondary, and tertiary approaches for tie handling. 
Various 2- and 3D-plots are provided and a package vignette is included.


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