Assuming that you get the list of indices into iData for the criteria, then you can use that to get the appropriate rows:
indx <- which(iData >5) # or whatever your criteria is DataSeq[indx,, drop=FALSE] # gives you a subset matrix of just the rows you are interested in. On Thu, May 21, 2009 at 10:10 AM, tsunhin wong <thjw...@gmail.com> wrote: > Dear R Users, > > I have created a 1500 x 20000 data frame - DataSeq. Each of the 1500 > rows represents a data sequence. > I have another data frame iData that stores the information of these > 1500 data sequences in the same order, for example, condition, gender, > etc. > > If I use "subset" to select certain groups within iData according to > some criteria that I have set, e.g. condition, gender > Then how can I used the retrieved subset of iData to point to and > retrieve corresponding rows in the DataSeq data.frame for > manipulations and analysis? > > I hope some of you can give me some idea! > Thank you very much!!! > > - John > > ______________________________________________ > 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<http://www.r-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? [[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.
