Similarity to dissimilarity

L&L also assign $D_{14}$ to Bray-Curtis dissimilarity, the complement of $S_{17}$, defined earlier. This is also provided in the Dissimilarity list since it is (very occasionally) useful to specify a dissimilarity rather than its complementary similarity – though normally PRIMER will take either form into any of its routines and interchange similarity and dissimilarity where it needs to. This interchange can be performed explicitly, though, if you wish (perhaps for outputting a matrix of one or other type), by taking Tools>Dissim which uses the relation $D + S = 100$ to convert from $S$ to $D$ or $D$ to $S$.