Finger gesture recognition in Matlab

This project uses a WiFi device to capture Channel State Information (CSI). It applies multipath mitigation and wavelet based denoising to filter out the environmental noises while trying to keep the CSI patterns only resulted from the finger gestures. The project then identifies the principal components of the CSI pattern for accurate gesture recognition. I have implemented most of the things already but stuck at identifying the principal components. I want you to help me to identify the principal components and also verify that the implemented parts are correct.