Plot complex signal with imaginary and complex
42 views (last 30 days)
Show older comments
Hi....i would like to plot imaginary and real number of my signal. The expected output as shown below, but i don'e know which plot in matlab that i have to use. Please help me
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1334340/image.png)
0 Comments
Accepted Answer
Star Strider
on 23 Mar 2023
Edited: Star Strider
on 23 Mar 2023
This is relatively straightforward —
Fs = 1000;
Tlen = 10;
t = linspace(0, Tlen*Fs, Tlen*Fs+1)/Fs;
s = exp(1j*t*2*pi);
Res = real(s);
Ims = imag(s);
figure
plot3(t, Res, Ims, '-k', 'DisplayName','Complex Signal')
hold on
plot3(t, Res, zeros(size(Res))-1, 'DisplayName','Re')
plot3(t, zeros(size(Ims))+1, Ims, 'DisplayName','Im')
hold off
axis('equal')
legend('Location','best')
grid on
xlabel('Time','Rotation',30)
ylabel('Real', 'Rotation',-33)
zlabel('Imaginary')
Tweak it to get the results you want.
.
0 Comments
More Answers (2)
Antoni Garcia-Herreros
on 23 Mar 2023
Hello Nirwana,
You can take a look at this thread
You could try something like this
plot3(x,y,z)
hold on
plot3(x, 2*ones(size(y)), z, 'LineWidth', 2); % project in x-z axis at y=1
plot3(x, y, -2*ones(size(x)), 'LineWidth', 2); % project in y-z axis at z=-2
0 Comments
John D'Errico
on 23 Mar 2023
n = 2000;
t = linspace(0,500,n);
Signal = cos(t/10) + i*sin(t/10); % a simple signal, as a function of time.
plot3(t,real(Signal),imag(Signal),'r-')
hold on
plot3(t,repmat(1.5,1,n),imag(Signal),'b-')
plot3(t,real(Signal),repmat(-1.5,1,n),'c-')
ylim([-1.5 1.5])
zlim([-1.5 1.5])
xlabel 'Time'
ylabel 'Real part'
zlabel 'Imaginary part'
0 Comments
See Also
Categories
Find more on Two y-axis in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!