Corrado, Package bigmemory has undergone a major re-engineering and will be available soon (available now in Beta version upon request). The version currently on CRAN is probably of limited use unless you're in Linux.
bigmemory may be useful to you for data management, at the very least, where x <- filebacked.big.matrix(80000, 80000, init=n, type="double") would accomplish what you want using filebacking (disk space) to hold the object. But even this requires 64-bit R (Linux or Mac, or perhaps a Beta version of Windows 64-bit R that REvolution Computing is working on). Subsequent operations (e.g. extraction of a small portion for analysis) are then easy enough: y <- x[1,] would give you the first row of x as an object y in R. Note that x is not itself an R matrix, and most existing R analytics can't work on x directly (and would max out the RAM if they tried, anyway). Feel free to email me for more information (and this invitation applies to anyone who is interested in this). Cheers, Jay #Dear friends, # #I have to use a very large matrix. Something of the sort of #matrix(80000,80000,n) .... where n is something numeric of the sort 0.xxxxxx # #I have not found a way of doing it. I keep getting the error # #Error in matrix(nrow = 80000, ncol = 80000, 0.2) : too many elements specified # #Any suggestions? I have searched the mailing list, but to no avail. # #Best, #-- #Corrado Topi # #Global Climate Change & Biodiversity Indicators #Area 18,Department of Biology #University of York, York, YO10 5YW, UK #Phone: + 44 (0) 1904 328645, E-mail: ct...@york.ac.uk -- John W. Emerson (Jay) Assistant Professor of Statistics Department of Statistics Yale University http://www.stat.yale.edu/~jay ______________________________________________ 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.
