Chattopadhyay, Somsubhra
2015-Nov-16 19:37 UTC
[R] Converting daily time series to monthly?
Hi all, I have daily time series of rainfall for sufficiently long period of time (70 years). I want to aggregate the data series into monthly, seasonal and annual basis. I know excel can handle this with the pivot table functionality. However, I have too many data points so, it's not a very smart way of dealing with this that way. I am wondering a simple R code or package may help me out here. I appreciate any feedback. Thanks Som -- Somsubhra Chattopadhyay Graduate Research Assistant Biosystem and Agricultural Engineering Department University of Kentucky, Lexington, KY 40546 Email: schattop14 at uky.edu Cell: 9198026951 [[alternative HTML version deleted]]
There are several ways to do this in R. You can get useful suggestions if you
follow the recommendations in the Posting Guide, including:
Send your email using pain text format since HTML tends to mangle code samples.
Provide a sample of data that represents your actual data. See [1] for
suggestions of how to do this... the dput function is particularly useful for
generating some code that puts the some data into our R session.
[1]
http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example
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On November 16, 2015 11:37:02 AM PST, "Chattopadhyay, Somsubhra"
<sch298 at g.uky.edu> wrote:>Hi all,
>
>I have daily time series of rainfall for sufficiently long period of
>time
>(70 years). I want to aggregate the data series into monthly, seasonal
>and
>annual basis. I know excel can handle this with the pivot table
>functionality. However, I have too many data points so, it's not a very
>smart way of dealing with this that way. I am wondering a simple R code
>or
>package may help me out here. I appreciate any feedback.
>
>Thanks
>Som
Hi You can use various ways. I would recommend to look at ?aggregate together with cut ?cut.POSIXt. Your data shall be converted to POSIX type ?strptime before using them for cut and aggregate. Cheers Petr> -----Original Message----- > From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of > Chattopadhyay, Somsubhra > Sent: Monday, November 16, 2015 8:37 PM > To: r-help at r-project.org > Subject: [R] Converting daily time series to monthly? > > Hi all, > > I have daily time series of rainfall for sufficiently long period of > time (70 years). I want to aggregate the data series into monthly, > seasonal and annual basis. I know excel can handle this with the pivot > table functionality. However, I have too many data points so, it's not > a very smart way of dealing with this that way. I am wondering a simple > R code or package may help me out here. I appreciate any feedback. > > Thanks > Som > > -- > Somsubhra Chattopadhyay > Graduate Research Assistant > Biosystem and Agricultural Engineering Department University of > Kentucky, Lexington, KY 40546 > Email: schattop14 at uky.edu > Cell: 9198026951 > > [[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.________________________________ Tento e-mail a jak?koliv k n?mu p?ipojen? dokumenty jsou d?v?rn? a jsou ur?eny pouze jeho adres?t?m. Jestli?e jste obdr?el(a) tento e-mail omylem, informujte laskav? neprodlen? jeho odes?latele. Obsah tohoto emailu i s p??lohami a jeho kopie vyma?te ze sv?ho syst?mu. Nejste-li zam??len?m adres?tem tohoto emailu, nejste opr?vn?ni tento email jakkoliv u??vat, roz?i?ovat, kop?rovat ?i zve?ej?ovat. Odes?latel e-mailu neodpov?d? za eventu?ln? ?kodu zp?sobenou modifikacemi ?i zpo?d?n?m p?enosu e-mailu. V p??pad?, ?e je tento e-mail sou??st? obchodn?ho jedn?n?: - vyhrazuje si odes?latel pr?vo ukon?it kdykoliv jedn?n? o uzav?en? smlouvy, a to z jak?hokoliv d?vodu i bez uveden? d?vodu. - a obsahuje-li nab?dku, je adres?t opr?vn?n nab?dku bezodkladn? p?ijmout; Odes?latel tohoto e-mailu (nab?dky) vylu?uje p?ijet? nab?dky ze strany p??jemce s dodatkem ?i odchylkou. - trv? odes?latel na tom, ?e p??slu?n? smlouva je uzav?ena teprve v?slovn?m dosa?en?m shody na v?ech jej?ch n?le?itostech. - odes?latel tohoto emailu informuje, ?e nen? opr?vn?n uzav?rat za spole?nost ??dn? smlouvy s v?jimkou p??pad?, kdy k tomu byl p?semn? zmocn?n nebo p?semn? pov??en a takov? pov??en? nebo pln? moc byly adres?tovi tohoto emailu p??padn? osob?, kterou adres?t zastupuje, p?edlo?eny nebo jejich existence je adres?tovi ?i osob? j?m zastoupen? zn?m?. This e-mail and any documents attached to it may be confidential and are intended only for its intended recipients. If you received this e-mail by mistake, please immediately inform its sender. Delete the contents of this e-mail with all attachments and its copies from your system. If you are not the intended recipient of this e-mail, you are not authorized to use, disseminate, copy or disclose this e-mail in any manner. The sender of this e-mail shall not be liable for any possible damage caused by modifications of the e-mail or by delay with transfer of the email. In case that this e-mail forms part of business dealings: - the sender reserves the right to end negotiations about entering into a contract in any time, for any reason, and without stating any reasoning. - if the e-mail contains an offer, the recipient is entitled to immediately accept such offer; The sender of this e-mail (offer) excludes any acceptance of the offer on the part of the recipient containing any amendment or variation. - the sender insists on that the respective contract is concluded only upon an express mutual agreement on all its aspects. - the sender of this e-mail informs that he/she is not authorized to enter into any contracts on behalf of the company except for cases in which he/she is expressly authorized to do so in writing, and such authorization or power of attorney is submitted to the recipient or the person represented by the recipient, or the existence of such authorization is known to the recipient of the person represented by the recipient.