aggregate combination data

I want to aggregate all values of diameter after the combination between
plots. For example all diameter (d) values for combination of n plots taken
by k.


On 14 November 2012 15:28, Rui Barradas <ruipbarradas at sapo.pt> wrote:

Hello,

You forgot to Cc the list.
As for your question, you want all possible combinations of rows? For all
possible values of k in 1:19?

sum(sapply(1:19, function(k) choose(19, k)))

[1] 524287

Or you want to split the data.frame by plot and the have all possible
combinations?

sum(sapply(1:10, function(k) choose(10, k)))

[1] 1023

sum(sapply(1:9, function(k) choose(9, k)))

[1] 511

Rui Barradas
Em 14-11-2012 11:31, catalin roibu escreveu:

  I don't want to sum the data from all combination. I want to group

(aggregate) the all values resulted from all combination possible.
plot d
1 14
1 13
1 12
1 14
1 18
1 20
1 21
1 43
1 108
1 43
2 41
2 61
2 83
2 61
2 84
2 45
2 21
2 12
2 11


On 14 November 2012 13:25, Rui Barradas <ruipbarradas at sapo.pt> wrote:

  Hello,

Please use ?dput to post your data.

dput(MyData)  # paste the output of this in a post.

And you must be more clear, what does "aggregate" mean? To sum? In the
mean time see

?combn

Hope this helps,

Rui Barradas
Em 14-11-2012 11:11, catalin roibu escreveu:

  Dear R users,

I want to aggregate all *d *data from  all combination of n *plots*
taken

by k.
Thank very much!

My data is like that:
              plot              d  1 14  1 13  1 12  1 14  1 18  1 20  1
21
   1
43  1 108  1 43  2 41  2 61  2 83  2 61  2 84  2 45  2 21  2 12  2 11
   ...  100
         10
100       12