zubin wrote: > Hello, a beginner R user - boy i wish there was a book on just data > manipulations for SAS users learning R (equivalent to the SAS DATA > STEP).. Okay, my question: > > I have a panel data set, hotel data occupancy by month for 12 months, > 1000 hotels. I have a field labeled 'year' and want to consolidate the > monthly records using an average into 1000 occupancy numbers - just a > simple average of the 12 months by hotel. In SQL this operation is > pretty easy, a group by query (group by hotel where year = 2005, avg > occupancy) - how is this done in R? (in R language not SQL). Thx! > > -zubin > > ______________________________________________ > 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 >
This is in the most basic R documentation. Please read it. -- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University ______________________________________________ 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