> On 1 Dec 2016, at 05:06, lily li <chocol...@gmail.com> wrote: > > Hi R users, > > I'm trying to manipulate dataset, but met some difficulties. > > df > year month flow > 2006 3 3.5 > 2006 4 3.8 > 2006 5 21 > 2006 6 32 > 2007 3 4.1 > 2007 4 4.4 > ... > > I want to calculate total flow for each year, and use the code below: > aggregate(flow~year, data=df, sum) > But it gave the error message: > Error in get(as.character(FUN), mode = "function", envir = envir) : > object 'FUN' of mode 'function' was not found > > What is the problem and how to solve it? Thanks for your help. >
Not enough information. If I try this df <- read.table(text="year month flow 2006 3 3.5 2006 4 3.8 2006 5 21 2006 6 32 2007 3 4.1 2007 4 4.4 ", header=TRUE) df aggregate(flow~year, data=df, sum) I get a correct answer. So you are likely doing something weird and not showing us all. > [[alternative HTML version deleted]] > Plan text mail. Has been asked many, many times before. Berend Hasselman > ______________________________________________ > 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. ______________________________________________ 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.
