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?


thank you very much!




On 8/16/07, jim holtman <jholtman@gmail.com> wrote:
>
> Can you provide an example of what you mean; e.g., the two input
> matrices and the desired output.
>
> On 8/16/07, Gianni Burgin <gianni.burgin@gmail.com> wrote:
> > Hi R user,
> >
> > I am new to R, and I have a very simple question for you. I have two
> matrix
> > A and B, with internally redundant rownames (but variables are
> different).
> > Some, but not all the rownames are shared among the two matrix. I want
> to
> > create a greater matrix that combines the previuos two, and has all the
> > possible combinations of matching rownames lines among matrix A and B.
> >
> > looking for the solution I bumped in merge but actually works on
> data.frame,
> > and in dataframe there could be no redundancy in names.
> >
> >
> > can you help me??
> >
> >        [[alternative HTML version deleted]]
> >
> > ______________________________________________
> > 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.
> >
>
>
> --
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
>
> What is the problem you are trying to solve?
>

	[[alternative HTML version deleted]]

