?aggregate ?window.zoo ?rollapply anyway have a look at package zoo
On Tue, Sep 9, 2008 at 3:25 PM, Alexy Khrabrov <[EMAIL PROTECTED]> wrote: > Greetings -- I have a dataframe a with one element a vector, time, of > POSIXct values. What's a good way to split the data frame into periods of > a$time, e.g. days, and apply a function, e.g. mean, to some other column of > the dataframe, e.g. a$value? > > Cheers, > Alexy > > ______________________________________________ > 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. > -- Stephen Sefick Research Scientist Southeastern Natural Sciences Academy Let's not spend our time and resources thinking about things that are so little or so large that all they really do for us is puff us up and make us feel like gods. We are mammals, and have not exhausted the annoying little problems of being mammals. -K. Mullis ______________________________________________ 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.
