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An R interface to version 0.3 of the 'ROPTLIB' optimization library (see <http://www.math.fsu.edu/~whuang2> for more information). Optimize real valued functions over manifolds such as Stiefel, Grassmann, and Symmetric Positive Definite matrices. For details see Martin et. al. (2020) <doi:10.18637/jss.v093.i01>.
Package details 


Author  Kofi P. Adragni [aut, cph], Sean R. Martin [aut, cre, cph], Andrew M. Raim [aut, cph], Wen Huang [aut, cph] 
Maintainer  Sean R. Martin <smarti1@umbc.edu> 
License  GPL (>= 2) 
Version  1.0.0 
Package repository  View on CRAN 
Installation 
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