[R] aggrete data from combination

Wed Nov 14 17:09:06 CET 2012

You can use combn(100, 2) to generate the combinations of the plots.

It is not clear to me what you want to do with the diameters. You have 4 diameter for plot 1 and 2 for plot 2. What should the output look like?

ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Research Institute for Nature and Forest
team Biometrie & Kwaliteitszorg / team Biometrics & Quality Assurance
Kliniekstraat 25
1070 Anderlecht
Belgium
+ 32 2 525 02 51
+ 32 54 43 61 85
Thierry.Onkelinx at inbo.be
www.inbo.be

To call in the statistician after the experiment is done may be no more than asking him to perform a post-mortem examination: he may be able to say what the experiment died of.
~ Sir Ronald Aylmer Fisher

The plural of anecdote is not data.
~ Roger Brinner

The combination of some data and an aching desire for an answer does not ensure that a reasonable answer can be extracted from a given body of data.
~ John Tukey

-----Oorspronkelijk bericht-----
Van: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] Namens catalin roibu
Verzonden: woensdag 14 november 2012 16:47
Aan: r-help at r-project.org
Onderwerp: [R] aggrete data from combination

Dear R users,
A have a dataframe (matrix) with two collumns (plot, and diameter (d)). I want all diameters values for different combination of plots.
For example I want all d values for all posible combination, 100C2 (all d values for plot 1 with all d values in the plot 2.......with all d values from plot 1 with all d values from plot 100, ...... with all d values from plot 99 with all d values from plot 100). Total 4950 values of diameter (d).
Thank you very much!

structure(list(plot = c(1L, 1L, 1L, 1L, 2L, 2L, 3L, 3L, 3L, 3L, 4L, 4L, 4L, 5L, 5L, 5L, 5L, 6L, 6L, 7L, 7L, 7L, 7L, 8L, 9L, 9L, 10L, 10L, 10L, 11L, 11L, 12L, 12L, 12L, 12L, 13L, 13L, 13L, 13L, 13L, 14L, 14L, 14L, 14L, 15L, 15L, 15L, 15L, 15L, 15L, 16L, 16L, 16L, 16L, 16L, 17L, 17L, 17L, 18L, 18L, 18L, 19L, 19L, 19L, 19L, 20L, 20L, 20L, 21L, 22L, 22L, 22L, 23L, 23L, 23L, 23L, 23L, 24L, 24L, 25L, 25L, 25L, 25L, 26L, 26L, 26L, 26L, 26L, 27L, 27L, 27L, 27L, 27L, 28L, 28L, 28L, 28L, 29L, 29L, 29L, 30L, 30L, 30L, 30L, 32L, 32L, 32L, 32L, 33L, 34L, 34L, 34L, 35L, 36L, 36L, 36L, 36L, 37L, 37L, 37L, 38L, 38L, 38L, 38L, 38L, 38L, 39L, 39L, 39L, 39L, 39L, 39L, 40L, 40L, 40L, 41L, 41L, 42L, 42L, 42L, 42L, 42L, 42L, 42L, 43L, 44L, 44L, 44L, 45L, 45L, 46L, 46L, 47L, 48L, 48L, 48L, 49L, 50L, 50L, 50L, 50L, 50L, 50L, 51L, 51L, 52L, 52L, 53L, 53L, 53L, 54L, 54L, 54L, 54L, 55L, 56L, 56L, 57L, 57L, 57L, 58L, 58L, 58L, 59L, 60L, 60L, 60L, 61L, 61L, 62L, 62L, 63L, 63L, 64L, 64L, 64L, 65L, 65L, 66L, 66L, 66L, 67L, 67L, 67L, 68L, 68L, 68L, 69L, 69L, 70L, 70L, 71L, 71L, 73L, 73L, 73L, 73L, 74L, 74L, 74L, 74L, 75L, 75L, 75L, 75L, 76L, 76L, 76L, 76L, 78L, 78L, 78L, 79L, 79L, 80L, 80L, 81L, 81L, 81L, 81L, 82L, 82L, 82L, 83L, 83L, 83L, 84L, 85L, 85L, 85L, 87L, 87L, 87L, 87L, 87L, 87L, 88L, 88L, 88L, 88L, 89L, 89L, 90L, 91L, 91L, 91L, 91L, 91L, 92L, 93L, 93L, 94L, 95L, 95L, 95L, 95L, 96L, 96L, 96L, 97L, 97L, 98L, 98L, 98L, 98L, 99L, 100L, 100L, 100L, 100L, 100L), d = c(15, 27.5, 10.5, 12.25, 14, 32.5, 80, 49.5, 15.25, 13.5, 12.25, 12, 72.5, 68.5, 12, 9.25, 12.75, 13.5, 28, 38, 10.25, 62.5, 73.5, 61.5, 54.5, 40, 24.25, 43, 13, 20.75, 23.25, 25.5, 7.25, 11.25, 60.5, 11.25, 8, 11, 93.25, 8.75, 10.5, 35, 19, 79, 60.5, 64.5, 53.75, 8.75, 9.75, 9.5, 12.5, 21, 10, 46.75, 48.5, 77.5, 23.75, 60, 11.5, 13.25, 13.75, 76.25, 12.5, 8, 70, 47.75, 52.25, 49.25, 11.25, 12.5, 15.25, 20.25, 19.25, 20.5, 13.5, 86, 23, 10.5, 20.25, 27.75, 11.25, 32.5, 28.25, 12.5, 14.75, 83, 19.25, 14.25, 21.5, 26.75, 11.25, 56, 19.75, 55.25, 10, 16.75, 12.5, 19.75, 13, 19.25, 9.75, 75, 12.5, 11.25, 14.5, 69.5, 13.75, 15.75, 63.75, 18.75, 9.25, 68, 29, 17.75, 15, 27.25, 10.25, 13.5, 68.25, 9.25, 13, 16.75, 36.5, 11.25, 87.25, 69.75, 66.25, 15.25, 14.75, 9, 15.75, 17.75, 82, 13.25, 20, 82.5, 86.5, 7.75, 14.5, 9.25, 95.5, 8.25, 12, 13.5, 16.5, 69, 15.5, 12, 42, 79.5, 40.75, 13.25, 10, 76.5, 10.75, 16.5, 12.5, 60.25, 11.25, 17, 63.25, 96, 14.25, 49.5, 56.5, 18, 84.25, 69.5, 12, 64.75, 48.5, 8.25, 29, 68, 7.25, 79.75, 55, 75.5, 60.75, 57.5, 61, 15.25, 69, 52.25, 98, 13.25, 14.25, 60.75, 14.25, 12.25, 56.5, 18, 76.25, 20.75, 10.5, 63.25, 12.5, 11.75, 84.5, 33.25, 77.75, 71.5, 11.5, 13.5, 19, 31.5, 27.25, 21, 13.25, 12.5, 31.75, 22, 20, 58.5, 40.5, 62, 85.5, 11.5, 12, 10.5, 80.75, 55.5, 87, 42.5, 70.5, 9.25, 56, 73.75, 12.75, 11, 59, 18.75, 10.75, 81, 14, 33.5, 13.25, 69.25, 8.75, 14.5, 63, 89.25, 73.75, 48.25, 58, 11.5, 17.25, 12.75, 10, 11.5, 15.25, 93.5, 14.5, 83.75, 9.75, 95, 13.5, 16.25, 8.5, 8.5, 70, 9.75, 72.5, 71.5, 9.5, 83, 43.75, 51, 55.25, 75.5, 61, 53.75, 60, 12.25, 47, 13.75, 86.5, 14.5, 10, 9.75, 12, 13.75, 31.75, 64.75, 13.75, 83.5, 45.5, 67, 84.5, 57.5, 46)), .Names = c("plot", "d"), class = "data.frame", row.names = c(NA,
-291L))

--
---
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
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