John Wasige
2015-Apr-05 09:34 UTC
[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]]
John Kane
2015-Apr-05 16:13 UTC
[R] Aggregating daily rainfall raster data to bimontly data
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: johnwasige at gmail.com > Sent: Sun, 5 Apr 2015 11:34:30 +0200 > To: r-help at 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 at 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!
Bert Gunter
2015-Apr-05 16:39 UTC
[R] Aggregating daily rainfall raster data to bimontly data
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 <jrkrideau at 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: johnwasige at gmail.com >> Sent: Sun, 5 Apr 2015 11:34:30 +0200 >> To: r-help at 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 at 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 at 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.