While inverting the matrix may be a problem, if you need to solve an equation A*x = b you do not need to invert A, there exist iterative methods which do need A or inv(A) - all you need to provide is a function that computes A*x for an arbitrary vector x. For such a large matrix this may be slow but possible.
--- Paul Gilbert <[EMAIL PROTECTED]> wrote: > I don't think you can define a matrix this large in > R, even if you have > the memory. Then, of course, inverting it there may > be other programs > that have limitations. > > Paul > > Jiao Yang wrote: > > Can R invert a 160000x160000 matrix with all > positive numbers? Thanks a lot! > > > > ______________________________________________ > > R-help@stat.math.ethz.ch 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. > ==================================================================================== > > La version française suit le texte anglais. > > ------------------------------------------------------------------------------------ > > This email may contain privileged and/or > confidential inform...{{dropped}} > > ______________________________________________ > R-help@stat.math.ethz.ch 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. > ______________________________________________ R-help@stat.math.ethz.ch 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.
