PCA.py == Principle Component Analysis RIOT == Rotational Invariant Orientation Transformation QuEST01.py == Quaternion Estimation 01 == basic program of TRIAD algorithm Quaternion_walking.py == QuEST applied for walking data heading.py == gives heading using Quaternion's rotationally transformed data supplied to PCA algo allsensors.py == Analysis using the data from all the sensors FFT.py == code for implementing FFT algo Euler_from_Quaterinon01.py == header file/clas for various conversions of the Quaternion