

[** Example of file naming **]

  't1_g4.txt' ==> 1st trial using LG G4 smartphone
  't3_gal5.txt' ==> 3rd trial using SAMSUNG Galaxy S5

[** Column information **]

  1 : Time (ms)
  2 : Magnetometer X (micro Tesla)
  3 : Magnetometer Y (micro Tesla)
  4 : Magnetometer Z (micro Tesla)