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




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Catalin-Constantin ROIBU
Forestry engineer, PhD
Forestry Faculty of Suceava
Str. Universitatii no. 13, Suceava, 720229, Romania
office phone     +4 0230 52 29 78, ext. 531
mobile phone   +4 0745 53 18 01
                       +4 0766 71 76 58
FAX:                +4 0230 52 16 64
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