Also this one:
AnnualFireCount2 <- as.data.frame(table(yukon$Fire_Year))
names(AnnualFireCount2) < c("Year","Fires")On Tue, Jun 14, 2011 at 9:01 AM, Majid Einian <einia...@gmail.com> wrote: > Hi, > > If I understood your question, maybe sth like this: > > AnnualFireCount<-aggregate(ANY.OF.YOUR.VARIABLES~Fire_Year, length, > data=yukon) > > you can put any variable name in your dataframe (eg Fire_Year) in the place > of ANY.OF.YOUR.VARIABLES as the function only counts them. > > > > On Tue, Jun 14, 2011 at 2:19 AM, saba <sa...@gmx.net> wrote: > >> Hello, >> >> I used R a year ago. With the data I am working with now, I realized that >> I >> need to go back to R. Unfortunately, my memory is not my friend if it >> comes >> down to coding :-) >> >> What I want to do is extract the length of a variable of a file with >> certain >> conditions and then print this number in a new variable.. >> >> My file (yukon), contains information about fires in the Yukon Territory, >> and it looks basically like this: >> >> Fire_Year Area_Hecta InitialFir ... and other headers but they are not >> important >> >> The Fire_Year ranges from 1980-2010, the Area_Hecta contains numbers and >> the >> InitialFir contains a date written like this: 24/05/1980 >> >> My end goal is to plot 2 plots, one with the summed area burned per year >> and >> the other plot should show the number of fires happening per year. >> >> I managed the first plot with the command aggregate. >> >> annualAB.sum<-aggregate(yukon$Area_Hecta~yukon$Fire_Year, sum, data=yukon) >> >> Now I am having troubles with the second plot. I created subsets for each >> year and then used the length command..then I could take all those numbers >> and put them in a new variable... >> >> y1980 <- subset(yukon,Fire_Year=="1980") >> length(y1980$Area_Hecta) >> >> but I somehow feel that there must be a better solution...maybe a loop? >> >> Any help is greatly appreciated >> Thanks so much >> Sandra >> >> >> >> -- >> View this message in context: >> http://r.789695.n4.nabble.com/Count-objects-and-print-it-into-a-new-variable-tp3595174p3595174.html >> Sent from the R help mailing list archive at Nabble.com. >> >> ______________________________________________ >> 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. >> > > > > -- > Majid Einian > PhD Candidate in "Economics" > Graduate School of Management and Economics > Sharif University of Technology > > -- Majid Einian PhD Candidate in "Economics" Graduate School of Management and Economics Sharif University of Technology [[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.
