[R] Aggregating daily rainfall raster data to bimontly data

[John Wasige]

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.berton at 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 <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]]
> >>
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