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

From: ecoinfo <ecoinformatics_at_gmail.com>
Date: Tue 18 Oct 2005 - 21:14:18 EST

RSiteSearch("speed up R code")
== search for a page having the words (speed, up, R, and code) surely R is found everywhere.
Although there are some useful archives, many of them are not. Furthermore, I need a general instruction instead of pieces (e.g. Patrick's book and Duncan's rules)

If I use "speed up R code" as a phrase, then only one not-very-useful hit.

Thanks,
Xiaohua

On 10/18/05, Thomas Schönhoff <tschoenhoff@gmail.com> wrote:
> Hello,
>
>
> 2005/10/18, ecoinfo <ecoinformatics@gmail.com>:
> > 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?
>
>
> regards
> Thomas
>
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R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Oct 18 21:20:23 2005

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