How to plot both real and imaginary part of complex exponential?
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Hi, I'm new to matlab since I try to plot this signal as complex exponential form with 5 terms but I got stuck
clc;
clear all;
close all;
t0 = 0;
T = 10;
k = 1:6
w = 2*pi/T
syms t
x = t^2 +(j*2*pi*t)
x1 = real(x)
y = imag(x)
k1 = -2: 2; %%% 5 terms
a = (1/T)*int(x*exp(-j*k1*w*t),t,t0,t0+T);
%%% i dont know how to plot it please help
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Star Strider
le 27 Oct 2020
For best results, replace ‘j’ with ‘1j’, then convert the result to double to use plot (since fplot is likely to be more difficult with discrete values of ‘k1’):
a = (1/T)*int(x*exp(-1j*k1*w*t),t,t0,t0+T);
num_a = double(a); % Convert To ‘double’ To Plot
figure
plot(k1,real(num_a))
hold on
plot(k1,imag(num_a))
plot(k1,abs(num_a),'--k')
hold off
grid
legend('\Re(a)','\Im(a)', '|a|')
That should do what you want.
Otherwise, I would have suggested:
syms k2
a(k2) = (1/T)*int(x*exp(-1j*k2*w*t),t,t0,t0+T);
figure
fplot(real(a), [-2 2])
hold on
fplot(imag(a), [-2 2])
fplot(abs(a), [-2 2], '--k')
hold off
grid
legend('\Re(a)','\Im(a)', '|a|')
.
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