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: bsscca.m
    path of file: ./repos/malini/Codes/deconvolution - model/spm8/external/fieldtrip/private
    
    the code of the file until where you have to start completion: function [w,rho] = bsscca(X, delay)

% BSSCCA computes the unmixing matrix based on the canonical correlation between a signal and its lagged-one copy. It implements the algorithm described in
    
function [y] = cellvecadd(x, v)

% [Y]= CELLVECADD(X, V) - add vector to all rows or columns of each matrix 
% in cell-array X

% check once and for all to save time
persistent bsxfun_exists;
if isempty(bsxfun_exists); 
    bsxfun_exists=(exist('bsxfun')==5); 
    if ~bsxfun_exists; 
        error('bsxfun not found.');
    end