b=abs([b;a(i)-a(i+1)]); error

a=all_peak(:,1);

b=[ ];

for i= 1:27

b=abs([b;a(i)-a(i+1)]); % getting error here as %

end

win_len=mean(b)+25;

where all_ peak= 27 *2 matrix like 1642 23

1723 -32

1746 28

Answer 1

[Rik]

Your loop goes up to 27, and inside the loop you look at i+1. You should let your loop go to numel(a)-1 instead of 27.