hey ; i would like to sum the following table by row and col. Appreciate your help. BrandName Segment Retail QSlod Oral B Whitening 10 2 Colgate Sensitive 20 4 Colgate Sensitive 30 6 Oral B Whitening 40 8 Close Up Whitening 50 10 Oral B Whitening 60 12 Output : BrandName Segment Retail QSlod Total Oral B Whitening 10 2 Sum by Col. Colgate Sensitive 20 4 Sum by Col. Colgate Sensitive 30 6 Oral B Whitening 40 8 Close Up Whitening 50 10 Oral B Whitening 60 12 Sum by Row Sum by Row -- View this message in context: http://r.789695.n4.nabble.com/sum-row-and-col-tp4100253p4100253.html Sent from the R help mailing list archive at Nabble.com.