See ?tapply However, as John said, without knowing the structure of your data, it is impossible to provide a guaranteed recipe. For example, does the data structure contain date information? -- it would be difficult (but not impossible depending on data structure) to aggregate by calendar (bi-monthly, depending on your meaning of "bi") without knowing the months. Aggregating by every n days would be easy, but that's probably not what you want.
Cheers, Bert Bert Gunter Genentech Nonclinical Biostatistics (650) 467-7374 "Data is not information. Information is not knowledge. And knowledge is certainly not wisdom." Clifford Stoll On Sun, Apr 5, 2015 at 9:13 AM, John Kane <jrkrid...@inbox.com> wrote: > Someone might if they had any idea of what the data actually looked like and > what you are trying to do. The 'bimonthly' for example, is ambiguous in > English; do you mean every two months or twice a month? > > Have a look at https://github.com/hadley/devtools/wiki/Reproducibility and > http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example > with special attention to dput() as a method of supplying sample data to the > help list. > > John Kane > Kingston ON Canada > > >> -----Original Message----- >> From: johnwas...@gmail.com >> Sent: Sun, 5 Apr 2015 11:34:30 +0200 >> To: r-help@r-project.org >> Subject: [R] Aggregating daily rainfall raster data to bimontly data >> >> Dear community, >> >> I have daily rainfall raster data for 30 years (1982_2011). I would like >> to >> aggregate daily to bimonthly raster data. Could somebody kindly help on >> how >> to go about it! >> >> Thanks for your help >> >> -- >> John >> >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> 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. > > ____________________________________________________________ > FREE ONLINE PHOTOSHARING - Share your photos online with your friends and > family! > Visit http://www.inbox.com/photosharing to find out more! > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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 -- To UNSUBSCRIBE and more, see 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.
