lsim: Remove input signal from plot
27 views (last 30 days)
Show older comments
I am using the function lsim to plot a system response. How can I remove the input signal from the plot so that it only shows the response?
0 Comments
Accepted Answer
Robert U
on 8 Nov 2019
Hi cricketking13,
if you don't want to have lsim plot the default plot, just "collect" the output and plot as you desire:
%% LPF
order = 3;
ripple = 1; %pass band ripple
f_c = 22e6;
[num1, den1] = cheby1(order, ripple, 2*pi*1.10*f_c, 'low', 's');
%% Create input signal
Fs = 200e6;
Ts = 1/Fs;
NFFT = 2^12;
Runtime = (NFFT-1)*Ts;
t = 0:Ts:Runtime;
a_in = 1;
fin = 5e6;
phase_in = 0;
y_in = a_in * sin( 2 * pi * fin * t + phase_in ); % 4096 points
%% filter signal
% create system
myFilter = tf(num1,den1);
% apply filter to time domain signal
[y_out, time] = lsim(myFilter,y_in,t);
% plot without y_in
plot(time,y_out')
Kind regards,
Robert
More Answers (0)
See Also
Categories
Find more on Digital Filter Analysis 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!