z1=xcorr(GA2L5E1(:,4),10000);
plot(z1)
I got the correlation of the vibration data, and I found this signal, now I have to subtract the window pitch, and the window pitch is 420 421 as seen.
and here is code which is i tried to find window range
for i=1:10000;
[M,I(i)]=max(z1(i:i+420));
I(i)=I(i)+i;
for i=1:25;
[N,X(i)]= max(I(i+400-399:i+400));
i=i+1;
end
end