Colleague, smokers? <- c( 83, 90, 129, 70 ) patients <- c( 86, 93, 136, 82 ) pairwise.prop.test(smokers, patients) # Output ????Pairwise comparisons using Pairwise comparison of proportions data:??smokers out of patients ?? 1???? ?????? 2???? ?????? 3???? 2 1.000 ????-???? ??????? -???? 3 1.000 ????1.000 ????-???? 4 0.119 ????0.093 ????0.124 Is there a way to generate a graph which illustrates the pairwise comparison of proportions? Thomas Subia