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The script below successfully produces a biplot of the data but the 'site names' (rows) and the names of the 'response variables' (columns) are shown as simple numerals (rather than the column and row names). How might I 'enforce' the use of the row/column names used in the datafile (section of datafile shown below)? Can anyone help, please? Section of datafile sample a b

I am new at 'R' and not even sure whether I am contacting the appropriate forum!! However, I have carried out several mantel tests (using 'R') on genetic data and would like to plot the results in the form of a histogam of the distribution - and preferably use a procedure that shows the critical 'r' value. The tail end of my analysis is shown below. I just need help to dig