Sorry, maybe I was not clear in what I want. I need the two indexes. k 2 4 4 4 4
Marlene 2011/9/16 Jean-Christophe BOUËTTÉ <jcboue...@gmail.com> > Hi there, > Assuming you would prefer to have only one min per row: > > apply(dat,1,which.min) > > there is a link to this function in the help page for ?min. > JC > > 2011/9/16 marlene marchena <marchenamarl...@gmail.com>: > > Hi, > > > > I need to repor the index of a min value of each row in a matrix, but I > > don't know how to do that when I have more than one min value. > > > > Here is my example > > > >> dat <- > > > matrix(c(5.4,4.8,5.6,4.8,NA,4.4,4.6,3.4,NA,NA,4,2.4,NA,NA,NA,2),byrow=TRUE,ncol=4) > > > >> dat > > [,1] [,2] [,3] [,4] > > [1,] 5.4 4.8 5.6 4.8 > > [2,] NA 4.4 4.6 3.4 > > [3,] NA NA 4.0 2.4 > > [4,] NA NA NA 2.0 > >> k <- apply(dat, 1, function(x) which(x == min(x, na.rm = TRUE))) > >> k > > [[1]] > > [1] 2 4 > > > > [[2]] > > [1] 4 > > > > [[3]] > > [1] 4 > > > > [[4]] > > [1] 4 > > > > But I need an output like this > > > > k<- 2 or 4, 4, 4, 4 > > > > Someone could help me with this issue. > > > > Thanks in advance, > > > > Marlene. > > > > [[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.
