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I'll add my $0.02 as I've just gone thru a (painful) transition to Linux. In my case Ubuntu didn't quite work for reason I'm still not sure (must be hardware + driver issue). I eventually put on opensuse 10.3 and installed R in an rpm pkgage on the command line. Getting R in was not simple. I got errors that complain about not finding BLAS and a couple other things I forgot. And you can't install packages by install.packages() on the prompt. I had to download them in tar.gz and then install. However, once the priliminaries are out...

I want to take the first row of each unique ID value from a data frame. For instance > ddTable <- data.frame(Id=c(1,1,2,2),name=c("Paul","Joe","Bob","Larry")) I want a dataset that is Id Name 1 Paul 2 Bob > unique(ddTable) Will give me all 4 rows, and > unique(ddTable$Id) Will give me c(1,2), but not accompanied by the name column.