void read(string, vector<string>&, vector<vector<double> >&);
void recenter(double, vector<vector<double> >, vector<vector<double> >&);
void output(string, vector<string>, vector<vector<double> >&, vector<double>);
void read(string, vector<string>&, vector<vector<double> >&);
void recenter(double, vector<vector<double> >, vector<vector<double> >&);
void output(string, vector<string>, vector<vector<double> >&, vector<double>);