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BarzilaiBorwein spectral methods for solving nonlinear system of equations, and for optimizing nonlinear objective functions subject to simple constraints. A tutorial style introduction to this package is available in a vignette on the CRAN download page or, when the package is loaded in an R session, with vignette("BB").
Package details 


Author  Ravi Varadhan [aut, cph, trl], Paul Gilbert [aut, cre], Marcos Raydan [ctb] (with coauthors, wrote original algorithms in fortran. These provided some guidance for implementing R code in the BB package.), JM Martinez [ctb] (with coauthors, wrote original algorithms in fortran. These provided some guidance for implementing R code in the BB package.), EG Birgin [ctb] (with coauthors, wrote original algorithms in fortran. These provided some guidance for implementing R code in the BB package.), W LaCruz [ctb] (with coauthors, wrote original algorithms in fortran. These provided some guidance for implementing R code in the BB package.) 
Date of publication  20141107 09:59:36 
Maintainer  Paul Gilbert <pgilbert.ttv9z@ncf.ca> 
License  GPL3 
Version  2014.101 
URL  http://www.jhsph.edu/agingandhealth/People/Faculty_personal_pages/Varadhan.html 
Package repository  View on CRAN 
Installation 
Install the latest version of this package by entering the following in R:

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