%Examples for the ELEC241 Matlab tutorial
%Chris Rozell - 8/26/03 (crozell@rice.edu)

%plot cumulatively summed sine waves with odd integer frequencies
%scaled by 1/f

t = 0:.001:1;        % independent (time) variable
A = 1;              % amplitude
f = 1:2:11;         % odd frequencies
s = zeros(1,length(t));   % empty 'signal' vector to start with

figure

% for each frequency, create the signal and add it into s(t)
for count=1:6
    s = s + A*sin(2*pi*f(count)*t)/f(count);
    subplot(6,1,count)
    plot(t,s);
    ylabel('Amplitude')
end

subplot(6,1,1)
title('Cumulatively summing sine waves')
subplot(6,1,6)
xlabel('Time (s)')