location zero crossings of the signal
3 views (last 30 days)
Show older comments
The following program produces sine signal plus noise. I have to write a function(Call zero crossing function that you see in the code below) in MATLAB to identify location zero crossings of the signal,found the locations where Signal changes sign.
clc
clear all
close all
N=1000; %Number of samples
n=0:N-1; % Sample index
Ts=0.0025; %Sample interval
f1=2; %freq=2Hz
%Generate signal+noise
x=0.5*sin(2*pi*f1*n*Ts+pi/4)+0.01*randn(size(n));
*_%Call zero crossing function
I=find_zero_cross_fnc(x);
s=zeros(size(I));_*
% Plot results
figure
stairs(x,'Linewidth',1), hold on
stem(I,s,'*r','Linewidth',3)
3 Comments
Answers (1)
John Petersen
on 15 Dec 2012
You could let this be your zero crossing function.
zind = diff(x>0);
0 Comments
See Also
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!