Large loops in R
On Dec 4, 2012, at 6:47 PM, Charles Novaes de Santana <charles.santana at 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 ax?! :) -- 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 Mediterr?neo de Estudios Avanzados(CSIC/UIB) Calle Miquel Marques 21, 07190 Esporles - Islas Baleares - Espa?a Office phone - +34 971 610 896 Cell phone - +34 660 207 940
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