Thanks Dennis and Daniel for your reply! On Wed, Apr 7, 2010 at 12:24 PM, Daniel Malter <dan...@umd.edu> wrote:
> > Assume you have suitable "week" indicator and your data is stored in a > data.frame named "data." Then you get the weekly averages by > > #simulate data > week <- rep(1:52,each=7) > x <- week+rnorm(52*7,) > y <- rev(week)+rnorm(52*7) > > #create data frame > data=data.frame(week,x,y) > > #get weekly averages in a list > averages=unlist(lapply(split(data,week),colMeans)) > > #unlist averages and store the results in matrix > matrix(averages,byrow=T,ncol=dim(data)[2]) > > HTH, > Daniel > -- > View this message in context: > http://n4.nabble.com/finding-weekly-average-tp1754518p1754604.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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<http://www.r-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ 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.
