[Gianni Burgin] >let say something like this >>a=matrix(1:25, nrow=5)
>>rownames(a)=letters[1:5] >> colnames(a)=rep("A", 5) >> a > A A A A A >a 1 6 11 16 21 >b 2 7 12 17 22 >c 3 8 13 18 23 >d 4 9 14 19 24 >e 5 10 15 20 25 >> b=matrix(1:40, nrow=8) >> rownames(b)=c(rep("a",4),rep("b",4)) >> colnames(b)=rep("B", 5) >> b > B B B B B >a 1 9 17 25 33 >a 2 10 18 26 34 >a 3 11 19 27 35 >a 4 12 20 28 36 >b 5 13 21 29 37 >b 6 14 22 30 38 >b 7 15 23 31 39 >b 8 16 24 32 40 >as a results I wold like something like > A A A A A B B B B B >a 1 6 11 16 21 1 9 17 25 33 >a 1 6 11 16 21 2 10 18 26 34 >a 1 6 11 16 21 3 11 19 27 35 >a 1 6 11 16 21 4 12 20 28 36 >b 2 7 12 17 22 5 13 21 29 37 >b 2 7 12 17 22 6 14 22 30 38 >b 2 7 12 17 22 7 15 23 31 39 >b 2 7 12 17 22 8 16 24 32 40 >does it is clear? is there a function that automate this operation? Like, maybe: cbind(a[rownames(b),], b) -- François Pinard http://pinard.progiciels-bpi.ca ______________________________________________ R-help@stat.math.ethz.ch 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.