I have a problem. My data is now in this form: plot area d 1 0.01 34.6 ................... 100 0.01 15.7
First, I want to aggregate plots start from a plot in the center of sample (10 plots x 10 plots). I want to aggregate after the model plot1 in the center of area (0,01 m2), after increasing plot area with the near plots until the entire area (10000 m2). For a good explication I will attach a figure. Second, I want to aggregate plots starting to 1, 1, with 2 , 1 with 2 with 3 .....1 with 2 with 3........with 99 with 100. Third> I want to aggregate the values but choose random>Ex. 75, 9 with 83,......etc Thank you very much! -- --- 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 silvic.usv.ro [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org 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.