+ //pGroup is the parsimony group info. i.e. for a leaf node it would contain 1 enter pGroup["groupname"] = 1;
+ //but for a branch node it may contain several entries so if the nodes children are from different groups it
+ //would have at least two entries pgroup["groupnameOfLeftChild"] = 1, pgroup["groupnameOfRightChild"] = 1.
+ //pCount is the nodes descendant group infomation. i.e. pCount["black"] = 20 would mean that 20 of the nodes
+ //descendant are from group black.
+
+ map<string, int> pGroups; //leaf nodes will only have 1 group, but branch nodes may have multiple groups.
+ map<string, int> pcount;
+