dimension reduction code

Over the last couple of years I have written a large number of R codes for
matrix approximation, multidimensional scaling, and multivariate analysis.
The general approach is to write a stand-alone R program and in addition an R driver that
uses .C() to call a shared library, which is by itself a stand-alone
C program. The main recent projects are C versions of the smacof MDS
majorization (MM) method with extensions to Sammon mapping, Elastic Scaling, 
strain, fStress, rStress -- all written in both R and C, all with both
metric and non-metric versions.

The papers/manuals/vignettes, largely unpublished and often unfinished, are at
https://jansweb.netlify.app/publication and the corresponding C, h, R, pdf,
qmd, tex, bib files are at https://github.com/deleeuw?tab=repositories. I am not
interested in transforming these papers/codes to full-fledged publications,
but the current form they may be useful to some. Everything in the repositories
is open source with a CC0 license, so it can be used (and modified)
without attribution. On the other hand, all suggestions for improvement
are welcome.
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Jan de Leeuw, Distinguished Professor Emeritus, UCLA Statistics 
https://jansweb.netlify.app ******** https://github.com/deleeuw
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Remember, no matter where you go, there you are. (Buckaroo Banzai)












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