[R] Aggregating daily rainfall raster data to bimontly data

[Bert Gunter]

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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