Dear Rui, Thanks for your reply. But the command seems not to be working. I am getting the following error. Error in FUN(X[[1L]], ...) : invalid 'type' (character) of argument
Any idea? :( Thanks, Eliza > Date: Mon, 31 Mar 2014 18:48:08 +0100 > From: ruipbarra...@sapo.pt > To: eliza_bo...@hotmail.com; r-help@r-project.org > Subject: Re: [R] monthly sum > > Hello, > > Maybe the following will do. > > > library(zoo) > ym <- as.yearmon(dat$Date, "%d-%B-%y") > aggregate(dat[,-1], list(ym), FUN = sum, na.rm = TRUE) > > > Also, please use dput() to post data examples. > > Hope this helps, > > Rui Barradas > > Em 31-03-2014 18:31, eliza botto escreveu: > > Dear useRs, > > I have the data of following format. I have only pasted some part of the > > data. The data starts from 1961 and ends up in december 1987. > > > > dat <- read.table(text="Date A B C D1-Jan-61 0.00 1.27 8.128 0.252-Jan-61 > > 6.10 9.144 94.742 15.493-Jan-61 0.00 0.508 1.27 0.004-Jan-61 0.00 0 NA > > 0.005-Jan-61 0.00 0 0 0.006-Jan-61 0.00 NA 0 0.007-Jan-61 0.00 0 0 > > 0.008-Jan-61 0.00 NA 0 0.009-Jan-61 0.00 NA 0 NA10-Jan-61 0.00 4.064 4.826 > > 0.76",sep="",header=TRUE,stringsAsFactors=FALSE) > > > > I need to calculate the sum of each months of A,B,C and D. There are NA's > > in each column so whenever there is NA it should be ignored. > > In the end we should have a table with 12 values for each year or all the > > for columns having dimension (12*number of years rows and 4 columns). > > > > Thankyou very much in advance > > Eliza > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list > > 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. > > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list 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.
