You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: PiCA2.m
    path of file: ./repos/OSET/under-development/bss
    
    the code of the file until where you have to start completion: function [s, peaks] = PiCA2(dat,ref,refframe,th,wlen1,wlen2,Itr)

% % % t0 = 90;    % reference frame center
% % % w = 5;      % reference frame half width
% % % wlen1 = 10; % exclusion averaging frame half width (should be more than the fetal expected effective width)
% % % wlen2 = 50; % peak exclusion window half length (should be less than the minimum expected fetal RR-interval)
% % %
% % % ref = dat(2,:);
% % % refframe = dat(2,t0-w:t0+w);

N = length(ref);
w = floor(length(refframe)/2);

    
function [s, peaks] = PiCA2(dat,ref,refframe,th,wlen1,wlen2,Itr)

% % % t0 = 90;    % reference frame center
% % % w = 5;      % reference frame half width
% % % wlen1 = 10; % exclusion averaging frame half width (should be more than the fetal expected effective width)
% % % wlen2 = 50; % peak exclusion window half length (should be less than the minimum expected fetal RR-interval)
% % %
% % % ref = dat(2,:);
% % % refframe = dat(2,t0-w:t0+w);

N = length(ref);
w = floor(length(refframe)/2);
for k = 1:Itr
    % % %     if k == 1,
    % % %         peaks = zeros(1,N);
    % % %         peaks(1:250/2:end