Dear Gregg, Take a look at ?duplicates. Here is an example: z<-data.frame( ID=c(1,1,2,1,1,1,1,2,2,3,4,3,2,2,2,2,3,4,4,5,5,6,6,7), y=rnorm(24) )
z[!duplicated(z$ID),] See ?duplicated for more information. HTH, Jorge On Sun, Jan 18, 2009 at 11:27 PM, <greggal...@gmail.com> wrote: > Thanks to everyone who helped me when I was totally clueless. Now I'm only > partially clueless, and in writing functions, which is major progress. > > > This is a function that is a major improvement over which I was using MS > Excel for: > > function() > { > files <- list.files(pattern="ABN*") # All the models start with the letters > ABN > for( i in 1:length(files)) # loop through the files. > { > f <- files[i] # temporary variable > load(f) # Put the "abnmodel" object in this workspace > z <- predict(abnmodel, abndata) # use my student's data, and their various > models to predict with new data. > write(z, "output.txt", ncolumns = 11, append = TRUE, sep="\t") # Write the > output to a file for import into Excel. > } > } > > This works great for PREPARING data for Excel, but I would rather not use > Excel. > > The problem is that between the lines "Z <- predict" and "write(z, " I need > some more code, but I can't get it to work. > > At the end of this function, I typically have 3,00 to 12,000 rows of data, > in which 10% to 33% are duplicates. I need to put the value z into > temporary storage, sort by the first column (if the first columns are > equal, the entire vector is an unwanted duplicate) test for equality, and > for each duplicate keep one, and discard the other(s). > > Thanks for any help! > > Gregg Allen > Not affiliated with any respectable organization. > > [[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.