% ECE 1250 S12 Lecture M12

% Today's lecture will start with the writing of a
%  function to implement a digital filter.  The digital filter example is in
%  dig_filter.m
% The filter passes low frequencies and blocks high frequencies.

% Next, we consider functions that translate phasors from rectangular to polar form and
%  vice versa.  The phasors will be represented in a unique way:
%   [a+jb, 0] (1st value complex, 2nd value zero) represents a + bi  (rectangular form)
%   [A, phi] (1st value real, 2nd value real)  represents Ae^i*phi  (polar form)
%            phi is in degrees
%
% r2p(phasor) will return a rectangular form for any phasor input
% p2r(phasor) will return a polar form for any phasor input
% ph_plus(array of phasors) will return the sum of phasors
% ph_mult(array of phasors) will return the product of phasors