Thanks Bert, The structure of the data is a raster stack with nraw=867, Ncol=995
Rgds John On Sun, Apr 5, 2015 at 6:39 PM, Bert Gunter <gunter.ber...@gene.com> wrote: > 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. > [[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.
