My table having 40 raw and 4 columns, in that 4 columns first column belongs to one group and the remaining constitute the other group. using following commands for calculating jaccard's index x <- read.csv(file name,header=T, sep= ) jac <- vegdist(x,method="jaccard") from this out file(jac) how can i find the p value for two groups ? and how can i plot notched box plot of these two groups? when i use boxes (as.matrix(jac)~x$first column,notch=TRUE) it showing 40 box plots.why it so? -- View this message in context: http://r.789695.n4.nabble.com/P-value-from-jaccard-s-index-matrix-tp4710302.html Sent from the R help mailing list archive at Nabble.com.