SharedOrderVector* getSharedOrderVector();
SharedRAbundVector getSharedRAbundVector(string); //get sharedrabundvector for a certain group
SharedSAbundVector getSharedSAbundVector(string); //get sharedsabundvector for a certain group
+ vector<SharedRAbundVector*> getSharedRAbundVector(); //returns sharedRabundVectors for all the users groups
private:
vector<string> data; //data[i] is a list of names of sequences in the ith OTU.