See ?order, e.g., (a <- expand.grid(1998:2000,1:2,1:3)) attach(a) (b <- a[order(Var1,Var3,Var2),])
Hank On Oct 18, 2005, at 3:20 PM, Guenther, Cameron wrote: > Hello, > I have a much larger dataset that is similar in form to: > year species length count > 1998 1 150 1 > 1998 2 200 1 > 1998 3 250 2 > 1999 1 150 3 > 1999 2 200 4 > 1999 3 250 5 > 2000 1 150 1 > 2000 2 200 1 > 2000 3 250 1 > 2001 1 150 2 > 2001 2 200 3 > 2001 3 250 1 > 2002 1 150 1 > 2002 2 200 2 > 2002 3 250 3 > > What I want is to have a line of data for each year x species x length > group combination > I would like the ouput to be: > > Year species length count > 1998 1 150 1 > 1998 2 200 1 > 1998 3 250 1 > 1998 3 250 1 > 1999 1 150 1 > 1999 1 150 1 > 1999 1 150 1 > 1999 2 200 1 > . > . > . > > Can anyone help me with a for statement of a function that can > accomplish this? > Thanks > > Cameron Guenther > Associate Research Scientist > FWC/FWRI, Marine Fisheries Research > 100 8th Avenue S.E. > St. Petersburg, FL 33701 > (727)896-8626 Ext. 4305 > [EMAIL PROTECTED] > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting- > guide.html > Dr. Martin Henry H. Stevens, Assistant Professor 338 Pearson Hall Botany Department Miami University Oxford, OH 45056 Office: (513) 529-4206 Lab: (513) 529-4262 FAX: (513) 529-4243 http://www.cas.muohio.edu/~stevenmh/ http://www.muohio.edu/ecology/ http://www.muohio.edu/botany/ "E Pluribus Unum" ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html