Hello, The next release of LiblineaR should offer the possibility of using sparse matrices. However, the next release date is not fixed yet...
On Thu, Nov 8, 2012 at 10:07 PM, Sam Steingold <s...@gnu.org> wrote: > > * Ben Bolker <ooby...@tznvy.pbz> [2012-11-07 21:51:07 +0000]: > > > > Sam Steingold <sds <at> gnu.org> writes: > > > >> It would be nice if LiblineaR() accepted data in the form of a sparse > >> matrix (it does not accept whatever e1071::read.matrix.csr returns). > >> > >> It would also be nice if there were functions to read/write files in the > >> native liblinear file format; I am sure the original liblinear library > >> provides at least the input code. > > > > You appear to have sent this to the general R-help mailing list > > rather than to the maintainer (or maybe you Bcc'd the maintainer)? > > It was CCed (not BCCed) to Thibault Helleputte <thellepu...@gmail.com> > > > Sparse matrices are nice, but once you start using sparse matrices > > you have to start worrying about the details of which linear algebra > > operators have been defined for them (e.g. whether the available > > operators allow pivoting, or work on rank-deficient matrices, or ...) > > So it's not always as easy as flipping a switch ... > > The library in question is merely a thin layes which passes the data to > the underlying C++ library. The original library comes with a command > line interface which accepts input file in sparse matrix format _ONLY_. > > > -- > Sam Steingold (http://sds.podval.org/) on Ubuntu 12.04 (precise) X > 11.0.11103000 > http://www.childpsy.net/ http://mideasttruth.com http://dhimmi.com > http://honestreporting.com http://think-israel.org http://jihadwatch.org > XFM: Exit file manager? [Continue] [Cancel] [Abort] > -- Thibault Helleputte, PhD. Spin-Off Project Manager +32 498 64 24 63 +32 10 47 24 15 http://www.dnalytics.com http://twitter.com/dnalytics [[alternative HTML version deleted]] ______________________________________________ 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.
