+ matrix["braycurtis"] = "braycurtis";
+ matrix["odum"] = "odum";
+ matrix["canberra"] = "canberra";
+ matrix["structeuclidean"] = "structeuclidean";
+ matrix["structchord"] = "structchord";
+ matrix["hellinger"] = "hellinger";
+ matrix["manhattan"] = "manhattan";
+ matrix["structpearson"] = "structpearson";
+ matrix["structkulczynski"] = "structkulczynski";
+ matrix["structchi2"] = "structchi2";
+ matrix["soergel"] = "soergel";
+ matrix["spearman"] = "spearman";
+ matrix["speciesprofile"] = "speciesprofile";
+ matrix["hamming"] = "hamming";
+ matrix["gower"] = "gower";
+ matrix["memchi2"] = "memchi2";
+ matrix["memchord"] = "memchord";
+ matrix["memeuclidean"] = "memeuclidean";
+ matrix["mempearson"] = "mempearson";
+