have a look at function rollapply() from package zoo.
I hope it helps.
Best,
Dimitris
On 7/26/2010 8:28 AM, Raghu wrote:
Hi
I have 3500 rows of data (say a single column) in a vector. If I want to
compare every ith element with the simple average of the previous (i-5)
elements, then I could write something like this:
for(i in 6:NROW(data)){
if(data[i] => mean(data[(i-5):i]) (counter[i]=1)}
}
Is it possible to replicate the above faster in R?
--
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center
Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
Fax: +31/(0)10/7043014
______________________________________________
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.
