Dear R-friends, Unfortunately the tables that I "past" on last email gone with bad visual structure. So I send it again. Sorry to do this so confuse. Miltinho === Table1 - Bird records State,SampleSite,Species,Bodysize SaoPaulo,Site1,Spp01,4.39 SaoPaulo,Site1,Spp04,4.05 SaoPaulo,Site1,Spp01,2.75 SaoPaulo,Site1,Spp02,8.18 SaoPaulo,Site1,Spp02,0.80 SaoPaulo,Site1,Spp02,9.37 SaoPaulo,Site2,Spp02,2.85 SaoPaulo,Site2,Spp01,1.13 SaoPaulo,Site2,Spp03,9.83 SaoPaulo,Site2,Spp01,8.24 SaoPaulo,Site2,Spp01,5.38 SaoPaulo,Site2,Spp02,7.87 SaoPaulo,Site2,Spp01,9.53 RioJaneiro,Site1,Spp02,2.29 RioJaneiro,Site1,Spp02,2.34 RioJaneiro,Site1,Spp01,6.01 RioJaneiro,Site1,Spp03,1.10 RioJaneiro,Site1,Spp01,9.57 RioJaneiro,Site2,Spp01,9.61 RioJaneiro,Site2,Spp01,6.00 RioJaneiro,Site2,Spp01,2.37 RioJaneiro,Site2,Spp02,6.33 RioJaneiro,Site2,Spp01,0.11 RioJaneiro,Site3,Spp02,7.53 RioJaneiro,Site3,Spp02,7.74 RioJaneiro,Site3,Spp01,3.16 RioJaneiro,Site3,Spp03,6.29 Bahia,Site1,Spp01,7.30 Bahia,Site1,Spp01,2.21 Bahia,Site2,Spp01,4.69 Bahia,Site2,Spp02,5.02 Bahia,Site2,Spp02,5.37 Bahia,Site2,Spp01,2.62 Bahia,Site2,Spp01,0.74 Bahia,Site3,Spp02,0.60 Bahia,Site3,Spp01,3.07 Bahia,Site3,Spp02,5.25 Bahia,Site3,Spp02,5.02 Bahia,Site4,Spp01,8.80 Bahia,Site4,Spp03,2.39 Bahia,Site4,Spp01,2.47 Bahia,Site4,Spp01,1.70 Bahia,Site5,Spp01,8.33 Bahia,Site5,Spp02,1.81 Table2 - SamplePlot Attributes State,SampleSite,Area Bahia,Site1,10 Bahia,Site2,25 Bahia,Site3,70 Bahia,Site4,15 Bahia,Site5,5 RioJaneiro,Site1,32 RioJaneiro,Site2,45 RioJaneiro,Site3,10 SaoPaulo,Site1,23 SaoPaulo,Site2,45 __________________________________________________ [[alternative HTML version deleted]]