Assuming you mean data frame and not matrix and depending on whether the empty spaces are intended to represent NA or 0 we have:
> DF <- data.frame(V1 = LETTERS[1:3], V2 = LETTERS[24:26], V3 = 1:3) > tapply(DF[[3]], DF[1:2], c) V2 V1 X Y Z A 1 NA NA B NA 2 NA C NA NA 3 > xtabs(V3 ~ V1 + V2, DF) V2 V1 X Y Z A 1 0 0 B 0 2 0 C 0 0 3 On Wed, Nov 5, 2008 at 7:53 PM, dinesh kumar <[EMAIL PROTECTED]> wrote: > Dear R users, > > I have a matrix like > > A X 1 > B Y 2 > C Z 3 > > I want to reshape this matrix into this format > > X Y Z > A 1 > B 2 > C 3 > > > > Thanks in advance for your help. > > > Dinesh > > -- > Dinesh Kumar Barupal > Junior Specialist > Metabolomics Fiehn Lab > UCD Genome Center > 451 East Health Science Drive > GBSF Builidng > University of California > DAVIS > 95616 > http://fiehnlab.ucdavis.edu/staff/kumar > > [[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. > ______________________________________________ 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.
