There are three equations that form the mathematical backbone of nearly all time-frequency-based analyses. If you memorize these equations, and can learn to recognize them embedded inside code and long equations, you will find learning data analysis to be much more intuitive and tangible. It is about 10 minutes long.

Download the Matlab script for the "trinity" of time-frequency analysis equations.
Designed, created, and maintained
in html5 by Mike X Cohen.