Hi Mike, Try this:
SITE <- c(101,102,103,104) WDAY <- c('MON','TUE','WED','THR','FRI') TOD <- c('MORN', 'AFTN') out <- expand.grid(SITE, WDAY, TOD) out HTH, Jorge On Thu, Mar 25, 2010 at 4:21 PM, Hosack, Michael <> wrote: > Hello, > > I need to create a dataframe containing all possible combinations of three > variables: SITE (101,102,103,104), WDAY (MON,TUE,WED,THR,FRI), and TOD > (MORN, AFTN). There should be a total of 40 unique combinations in my > dataframe. I used expand.grid() successfully(?) to create my dataframe, but > then when I went to order it by SITE, the resultant dataframe only contained > four rows, one for each site. There must be something about this function > that I don't understand. Any advice would be appreciated. > > Thank you, > > Mike > > ______________________________________________ > 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.