On Dec 4, 2012, at 6:47 PM, Charles Novaes de Santana <charles.sant...@gmail.com> wrote:
> Dear all, > > I need to access data from a large matrix (48000 x 48000) and to do it > I am trying to run two loops using "for" command. Surely it is been a > very slow job. > > I heard that "for" is not the best option to perform large loops in R, > but I don't really know what would be the best (fast) option. sapply? > vapply? Could anyone help me with this issue, please? What exactly are you trying to do? It's likely doable with a few vectorized operations. Michael > > Thank you very much for your attention and for any help! > > Best regards, > > Charles > > -- > Um axé! :) > > -- > Charles Novaes de Santana > http://www.imedea.uib-csic.es/~charles > PhD student - Global Change > Laboratorio Internacional de Cambio Global > Department of Global Change Research > Instituto Mediterráneo de Estudios Avanzados(CSIC/UIB) > Calle Miquel Marques 21, 07190 > Esporles - Islas Baleares - España > > Office phone - +34 971 610 896 > Cell phone - +34 660 207 940 > > ______________________________________________ > 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. ______________________________________________ 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.