int main()
{
Matrix3f A;
Vector3f b;
A << 1,2,3, 4,5,6, 7,8,10;
b << 3, 3, 4;
cout << "Here is the matrix A:\n" << A << endl;
cout << "Here is the vector b:\n" << b << endl;
Vector3f x = A.colPivHouseholderQr().solve(b);
cout << "The solution is:\n" << x << endl;
}
int main(void)
{
cout << endl;
try {
sql::Driver *driver;
sql::Connection *con;
sql::Statement *stmt;
sql::ResultSet *res;
/* Create a connection */
driver = get_driver_instance();
con = driver->connect("tcp://serverip:port", "username", "###");
/* Connect to the MySQL test database */
con->setSchema("PECKHAM_RAW_DATA");
int i = 0;
int j = 0;
Matrix3f A;
Vector3f b;
std::string mac_current;
stmt = con->createStatement();
res = stmt->executeQuery("SELECT COUNT(MAC_ROUTER), MAC_CLIENT, MAC_ROUTER,AVG(`SIGNAL`), `ROUTERS`.`ROUTER_POSITION_X`,`ROUTERS`.`ROUTER_POSITION_Y`,`ROUTERS`.`ROUTER_POSITION_Z` FROM PECKHAM_RAW_DATA.RAW_PACKET_INFO JOIN PECKHAM_RAW_DATA.ROUTERS ON `ROUTERS`.`ROUTER_MAC` = `RAW_PACKET_INFO`.`MAC_ROUTER` WHERE `RAW_PACKET_INFO`.DT > NOW()-INTERVAL 1 second GROUP BY MAC_CLIENT,MAC_ROUTER ORDER BY MAC_CLIENT");
while (res->next()) {
if (i == 0 and j == 0) {
mac_current = res->getString(2);
cout<< mac_current <<"|0|"<<j<<"\n";
client_locations[i].client_data[j].MAC = res->getString(2);
client_locations[i].client_data[j].DISTANCE = pow ((100/ pow(10,((atof(res->getString(4).c_str()))/10)) ) * (pow ((0.404262661 / (4*3.14159265)),2)),(1/2.9));
client_locations[i].client_data[j].X = atof(res->getString(5).c_str());
client_locations[i].client_data[j].Y = atof(res->getString(6).c_str());
client_locations[i].client_data[j].Z = atof(res->getString(7).c_str());
j++;
}
else{
if (mac_current == res->getString(2)){
j++;
cout<< mac_current <<"|1|"<<j<<"\n";
client_locations[i].client_data[j].MAC = res->getString(2);
client_locations[i].client_data[j].DISTANCE = pow ((100/ pow(10,((atof(res->getString(4).c_str()))/10)) ) * (pow ((0.404262661 / (4*3.14159265)),2)),(1/2.9));
client_locations[i].client_data[j].X = atof(res->getString(5).c_str());
client_locations[i].client_data[j].Y = atof(res->getString(6).c_str());
client_locations[i].client_data[j].Z = atof(res->getString(7).c_str());
}
else {
i++;
j = 0;
mac_current = res->getString(2);
cout<< mac_current <<"|2|"<<j<<"\n";
client_locations[i].client_data[j].MAC = res->getString(2);
client_locations[i].client_data[j].DISTANCE = pow ((100/ pow(10,((atof(res->getString(4).c_str()))/10)) ) * (pow ((0.404262661 / (4*3.14159265)),2)),(1/2.9));
client_locations[i].client_data[j].X = atof(res->getString(5).c_str());
client_locations[i].client_data[j].Y = atof(res->getString(6).c_str());
client_locations[i].client_data[j].Z = atof(res->getString(7).c_str());
}
}
}
for (i = 0; i <= 50; i++){
if (client_locations[i].client_data[0].DISTANCE != 0 && client_locations[i].client_data[1].DISTANCE != 0 && client_locations[i].client_data[2].DISTANCE != 0)
{
Matrix3f A;
Vector3f b;
A << client_locations[i].client_data[0].X,client_locations[i].client_data[0].Y,client_locations[i].client_data[0].Z, client_locations[i].client_data[1].X,client_locations[i].client_data[1].Y,client_locations[i].client_data[1].Z, client_locations[i].client_data[2].X,client_locations[i].client_data[2].Y,client_locations[i].client_data[2].Z;
b << client_locations[i].client_data[0].DISTANCE,client_locations[i].client_data[1].DISTANCE,client_locations[i].client_data[2].DISTANCE;
Vector3f x = A.colPivHouseholderQr().solve(b);
cout << "Here is the vector b:\n" << b << endl;
cout << "The Position for: "<<client_locations[i].client_data[0].MAC<<"\n" << x << endl;
}
}
delete res;
delete stmt;
delete con;
} catch (sql::SQLException &e) {
cout << "# ERR: SQLException in " << __FILE__;
cout << "(" << __FUNCTION__ << ") on line " << __LINE__ << endl;
cout << "# ERR: " << e.what();
cout << " (MySQL error code: " << e.getErrorCode();
cout << ", SQLState: " << e.getSQLState() << " )" << endl;
}
cout << endl;
return EXIT_SUCCESS;
}