[R] Aggregating daily rainfall raster data to bimontly data

[Jeff Newmiller]

Please stop posting using HTML (as the Posting Guide warns you), and follow John Kane's advice. Your reply below is not helping us understand as well as you seem to think it should.
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Sent from my phone. Please excuse my brevity.

On April 5, 2015 9:52:18 AM PDT, John Wasige <johnwasige at gmail.com> wrote:
>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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>> >> PLEASE do read the posting guide
>> >> http://www.R-project.org/posting-guide.html
>> >> and provide commented, minimal, self-contained, reproducible code.
>> >
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>> > and provide commented, minimal, self-contained, reproducible code.
>>
>
>	[[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.