In the lab you should have taken three data sets (sine, square, triangle).  For those data sets, do the following - working individually, and handing in your results individually.

• Using the fft function in Matlab, determine the following.
• The frequencies present in each signal.  (In other words, compute the numerical values of the frequencies you find the the FFT plot.)
• The magnitude of the components at those frequencies.
• Compare your numerical results with what is expected from theory.  Give a table of at least the fundamental and four harmonics, and compare numerical and theoretical values.  Comment on how well the theory predicted the values you found.