Semidiscrete Decomposition The semidiscrete decomposition (SDD) approximates a matrix as a weighted sum of outer products formed by vectors with entries constrained to be in the set {-1, 0, 1}. Software Eric Sun <esun@cs.stanford.edu> Tamara G. Kolda, Dianne P. O'Leary GPL-2 2009-06-14 application/tgz http://CRAN.R-project.org/package=sddpack