Hello, Try (x is your matrix)
rowMeans(x) apply(x, 1, function(y) mean( y[y >= 0] )) Hope this helps, Rui Barradas york8866 wrote > > Dear all, > > I have encountered a problem with such a dataset: > > 1 52 2 5 2 6 > 15 23 2 1 3 3 > 2 5 1 9 8 9 > 6 -5 3 6 -5 96 > -1 6 3 8 5 9 > . . . . . . > . . . . . . > > > I want to calculate the means of each row of the dataset. In addition, I > need to delete the negative values in each row first before the > calculation of the means. > > can anyone show me how to deal with it? > > thanks, > -- View this message in context: http://r.789695.n4.nabble.com/Help-deleting-negative-values-in-a-matrix-and-do-statistic-analysis-tp4617792p4617832.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.
