Hi > -----Original Message----- > From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Shivi82 > Sent: Wednesday, June 17, 2015 9:19 AM > To: r-help@r-project.org > Subject: [R] Aggregating on date at Monthly Level > > HI All, > I have situation where i am aggregating weight on monthly and quarterly > level. > I need to summarize weight on variable ship date i.e. shipping date . > As this date is in a character format so used the conversion as: > > Shipdate<-as.Date("retail$ship.date", format="%m-%d-%Y"). But when i > see the output of Shipdate the result is NA.
Are you sure that format is in aggreement with ship.date? > typeof(Shipdate) gives me "double". I am not sure what this is var type > whereas class (Shipdate) is Date so i am a bit puzzled. > > Then i have created a new var which sums weight and gives me the > desired > result- > aggr<-aggregate(retail$weight,list(retail$ship.date),mean) > > Now if i want to group the result on a Month level i used the below > syntax and gives me error: > cut.Date(aggr,breaks = "Month",labels = TRUE). "x must be numeric"- in > the above syntax i have created it as a list. AFAIK aggr is data frame with Group.1 column the ship.date and x column the mean weight for each ship.date. If you want to further aggregate on month you can use the same approach with second parameter in aggregate an indication of months. If you want something else you shall be more specific about your data and intended result. > > Is there an easier way to achieve what i am looking for. Kindly > suggest. Probably easiest way would be if you familiarise yourself with data types and operations e.g. by reading R-intro. Cheers Petr > Thanks, Shivi > > > > -- > View this message in context: > http://r.789695.n4.nabble.com/Aggregating-on-date-at-Monthly-Level- > tp4708741.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@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 jakékoliv k němu připojené dokumenty jsou důvěrné a jsou určeny pouze jeho adresátům. Jestliže jste obdržel(a) tento e-mail omylem, informujte laskavě neprodleně jeho odesílatele. Obsah tohoto emailu i s přílohami a jeho kopie vymažte ze svého systému. Nejste-li zamýšleným adresátem tohoto emailu, nejste oprávněni tento email jakkoliv užívat, rozšiřovat, kopírovat či zveřejňovat. Odesílatel e-mailu neodpovídá za eventuální škodu způsobenou modifikacemi či zpožděním přenosu e-mailu. V případě, že je tento e-mail součástí obchodního jednání: - vyhrazuje si odesílatel právo ukončit kdykoliv jednání o uzavření smlouvy, a to z jakéhokoliv důvodu i bez uvedení důvodu. - a obsahuje-li nabídku, je adresát oprávněn nabídku bezodkladně přijmout; Odesílatel tohoto e-mailu (nabídky) vylučuje přijetí nabídky ze strany příjemce s dodatkem či odchylkou. - trvá odesílatel na tom, že příslušná smlouva je uzavřena teprve výslovným dosažením shody na všech jejích náležitostech. - odesílatel tohoto emailu informuje, že není oprávněn uzavírat za společnost žádné smlouvy s výjimkou případů, kdy k tomu byl písemně zmocněn nebo písemně pověřen a takové pověření nebo plná moc byly adresátovi tohoto emailu případně osobě, kterou adresát zastupuje, předloženy nebo jejich existence je adresátovi či osobě jím zastoupené známá. 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. ______________________________________________ R-help@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.
