I have a sample in size of 20000 rows, for instanse: id weight p value 100 125 101 160 102 150 ,........ how can I calculate the p value after the permutation and how the permutation test cab be done? Thanks, -- View this message in context: http://r.789695.n4.nabble.com/Permutation-test-tp2299535p2299535.html Sent from the R help mailing list archive at Nabble.com.