Finding the bug
% Ts was originally set to 1/13 (aka T0) and the graph displayed only one cycle. Since we want 13 % cycles, divide this previous Ts value by 13 again. Using Ts = T0/13 the proper grph is shown F0 =13; T0 =1/F0; Ts = T0/13; t = 0:Ts:13*T0; x = real(exp(j*(2*pi*F0*t-pi/2))); plot(t,x)
