No its not perfectly working see below > j<-c(1,1,2,2,3) > k<-c(2,1,1,1,1) > j%%k [1] 1 0 0 0 0 problem comes when one of my sequence have 1 -- View this message in context: http://r.789695.n4.nabble.com/problem-in-matching-numbers-in-two-variables-tp4594912p4595849.html Sent from the R help mailing list archive at Nabble.com.