Janet: The zoo package and aggregate.zoo should do the trick. I have done this many times with these tools. HTH,
Stephen On Thu, 2011-02-17 at 11:56 -0800, Janet Choate wrote: > Hi all, > i'm sure there is an easy way to do this, but i'm stumped, so any help would > be appreciated. > > i have a single column of data for precipitation every 15 minutes over a > year. i want to sum the precip to daily data. > so the first 96 records = the first day, the second 96 records = the second > day, and so on.... > is there a way to write a for loop that would sum the data to daily, and > write each value to a second object so i end up with a file of daily precip? > > thanx, > Janet > > [[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. ______________________________________________ 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.
