Hello, m[ , sapply(1:ncol(m), function(j) sapply("B", `%in%`, m[[1 , j]])), drop=F > ] >
It indeed does. Thank you very much! [[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.