Hi, I have a table like that:
> datatest var1 var2 var3 1 1 1 1 2 3 1 2 3 8 1 3 4 6 1 4 5 10 1 5 6 2 2 1 7 4 2 2 8 6 2 3 9 8 2 4 10 10 2 5 I need to create another table based on that with the rules: take a random sample by var2==1 (2 sample rows for example): var1 var2 var3 1 1 1 1 4 6 1 4 in this random sample a get the 1 and 4 value on the var3, now I need to complete the table with var1==2 with the lines that var3 are not select on var2==1 The resulting table is: var1 var2 var3 1 1 1 1 4 6 1 4 7 4 2 2 8 6 2 3 10 10 2 5 the value 1 and 4 on var3 is not present in the var2==2. I try several options but without success. take a random value is easy, but I cant select the others value excluding the random selected values. Any help? Thanks Ronaldo -- 17ª lei - Seu orientador quer que você se torne famoso, de modo que ele possa, finalmente, se tornar famoso. --Herman, I. P. 2007. Following the law. NATURE, Vol 445, p. 228. -- > Prof. Ronaldo Reis Júnior | .''`. UNIMONTES/DBG/Lab. Ecologia Comportamental e Computacional | : :' : Campus Universitário Prof. Darcy Ribeiro, Vila Mauricéia | `. `'` CP: 126, CEP: 39401-089, Montes Claros - MG - Brasil | `- Fone: (38) 3229-8192 | ronaldo.r...@unimontes.br | chrys...@gmail.com | http://www.ppgcb.unimontes.br/lecc | ICQ#: 5692561 | LinuxUser#: 205366 -- Favor NÃO ENVIAR arquivos do Word ou Powerpoint Prefira enviar em PDF, Texto, OpenOffice (ODF), HTML, or RTF. ______________________________________________ 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.