On 02-11-2012, at 19:11, Ni, Shenghua wrote: >> r<-c(1,1,9,1,1,1) >> col_no<-cut(r,c(0,2,3,6,8,10,100)) >> levels(col_no)<-c("<2%","2-4%","4-6%","6-8%","8-10%",">10%") >> col_no > [1] <2% <2% 8-10% <2% <2% <2% > Levels: <2% 2-4% 4-6% 6-8% 8-10% >10% > Where is the question? Berend