?which Does something like this help?
which(aa==29) aa[ -which(aa==29)] --- _Fede_ <[EMAIL PROTECTED]> wrote: > > Hi all. > > I have certain problem with the extraction of data > from matrices. I know how > extract elements from a matrix, but what I would > like to do is to extract a > concrete number, not an element. For example if I > have this matrix X: > > [,1] [,2] [,3] [,4] > [1,] 3 13 23 33 > [2,] 9 19 29 39 > [3,] 10 20 30 40 > > I can do X[-2] or X[2] in order to eliminate the > element of the matrix or to > extract it, respectively. > > But, what I need is to extract or to eliminate a > value of the matrix. For > example the 29. > > Can I do this? How? > > Thanks for the help. > -- > View this message in context: > http://www.nabble.com/Extract-from-matrix-tp15502655p15502655.html > Sent from the R help mailing list archive at > Nabble.com. > > ______________________________________________ > 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.
