A new package 'bvls' is available on CRAN. The package provides an R interface to the Stark-Parker algorithm for bounded-variable least squares (BVLS) that solves A x = b with the constraint l <= x <= u under least squares criteria, where l,x,u \in R^n, b \in R^m and A is an m \times n matrix.
The Stark-Parker BVLS algorithm was published in Stark PB, Parker RL (1995). Bounded-variable least-squares: an algorithm and applications, Computational Statistics, 10, 129-141. The packages interfaces the Fortran77 code distributed via the statlib on-line software repository at Carnegie Mellon University (http://lib.stat.cmu.edu/general/bvls), modified very slightly for compatibility with the gfortran compiler. Stark and Parker have agreed to distribution under GPL version 2 or newer. The function 'bvls::bvls' returns an object of (S3) class 'bvls', which has methods for 'coefficients', 'fitted.values', 'deviance' and 'residuals'. ==== Version 1.1 of the package 'nnls' is available on CRAN. Changes between Version 1.0 and 1.1: o The function 'nnls::nnls' returns an object of (S3) class 'nnls', which has methods for 'coefficients', 'fitted.values', 'deviance' and 'residuals' o The function 'nnnpls::nnnpls' allows each element of x to be constrained to either a non-positive or a non-negative value ---- Katharine Mullen mail: Department of Physics and Astronomy, Faculty of Sciences Vrije Universiteit Amsterdam, de Boelelaan 1081 1081 HV Amsterdam, The Netherlands room: T.1.06 tel: +31 205987870 fax: +31 205987992 e-mail: [EMAIL PROTECTED] homepage: http://www.nat.vu.nl/~kate/ _______________________________________________ R-packages mailing list [EMAIL PROTECTED] https://stat.ethz.ch/mailman/listinfo/r-packages ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
