% VTB7
%
% VTB7_1 is an example of taking a power spectral density
%        of data. The power spectral density of a signal
%        containing .5 Hz and 1.59 Hz signals is plotted.
% VTB7_2 generates the discrete frequency response
%        function (H(iw)) between two signals.
% VTB7_3 A set of files numbered from VTB7_3_1.mat to
%        VTB7_3_6.mat exist which contain discrete frequency
%        response functions.  After loading the data,
%        plot(FreqV,abs(Xfer)) will give the magnitude
%        and plot(FreqV,angle(Xfer)) will give the phase
%        plot.  Note the differences between experimental
%        data and what you would expect from theory.