Re: [R] Ways to speed up R code?

From: Thomas Schönhoff <>
Date: Tue 18 Oct 2005 - 20:17:34 EST


2005/10/18, ecoinfo <>:
> Hi R-users:
> Yesterday I ran a R code for 9 hours and it did not show any sign to
> stop. Then I interrupted it and found it had completed 82.5%.
> This morning I decided to wait for another 11 hours to see what will
> happen. Wait a minute, I heard that transforming data.frame to matrix
> will make R code faster. Then I made the modification in my R code.
> Oooh, the new code finished within 30 minutes!!
> Are there any other tips to speed up R program? Or someone could
> indicate me some documents or websites on R code optimization?
> #OS: Win XP, CPU: Pentium IV, 3.20G, Memory: 1G
> #for() loop: 1000*1616*3*41, 3 data.frames (dim = c(1616,5), c(1616),
> c(1616) respectively)

RSiteSearch("speed up R code") gives 346 hits, so this problem has been discussed on this list some time before. Maybe something worth to pay attention to?

Thomas mailing list PLEASE do read the posting guide! Received on Tue Oct 18 20:25:56 2005

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