Dear Muhammad, Try also: x=c(3,3,3,3,0,0,0,0,5,5,5,5,8,8,8,8) x=matrix(x, nrow=4) which(colSums(x)==0) [1] 2
HTH, Jorge On Wed, Sep 3, 2008 at 9:45 AM, Muhammad Azam <[EMAIL PROTECTED]> wrote: > Dear R community > I have a problem regarding which of the column in a matrix contains all of > zero elements. e.g. > x=c(3,3,3,3,0,0,0,0,5,5,5,5,8,8,8,8); x=matrix(x, nrow=4) > the output is > > x > [,1] [,2] [,3] [,4] > [1,] 3 0 5 8 > [2,] 3 0 5 8 > [3,] 3 0 5 8 > [4,] 3 0 5 8 > In this case the required column is second so the result should be "2". How > can i get it? > > > best regards > > Muhammad Azam > > > > > [[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. > [[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.
