On Sat, 3 Jan 2009 22:25:38 +0530 Ajay Shah <ajays...@mayin.org> wrote:
AS> system.time(for (i in 1:10000000) {a[i] <- a[i] + 1}) AS> I wonder what we're doing wrong! it is no secret that R does badly with loops. Thats why it is recommended to use vectorized operations. Another approach is just in time compilation, which would speed up simple loops. There is an interesting entry on R-wiki showing speeding up things: http://wiki.r-project.org/rwiki/doku.php?id=tips:programming:code_optim2&s=just%20time hth Stefan ______________________________________________ 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.