void sortD(); //Sorts the data in descending order.
void push_front(int, int, string); //abundance, otu, groupname
void insert(int, int, string); //abundance, otu, groupname
- void push_back(int, int, string); //abundance, otu, groupname
+ void push_back(int, string); //abundance, groupname
void pop_back();
void resize(int);
int size();