Another way would be a which statement. good_dataset=data[,which(colSums(data)!=0)] I believe this depends on how the data are structured though. -- View this message in context: http://r.789695.n4.nabble.com/drop-columns-whose-rows-are-all-0-tp4324231p4325474.html Sent from the R help mailing list archive at Nabble.com.