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: makeringlatticeCIJ.m
    path of file: ./repos/CanlabCore/CanlabCore/External/2019_03_03_BCT
    
    the code of the file until where you have to start completion: function [CIJ] = makeringlatticeCIJ(N,K)
%MAKERINGLATTICECIJ     Synthetic lattice network
%
%   CIJ = makeringlatticeCIJ(N,K);
%
%   This function generates a directed lattice network with toroidal 
%   boundary counditions (i.e. with ring-like "wrapping around").
%
%   Inputs:     N,      number of vertices
%               K,      number of edges
%
%   Outputs:    CIJ,    connection matrix
%
%   Note: The lattice is made by placing connections as close as possible 
%   to the main diagonal, with wrapping around. No connections are made 
%   on the main diagonal. In/Outdegree is kept approx. constant at K/N.
%
%
%   Olaf Sporns, Indiana University, 2005/2007

% initialize
CIJ = zeros(N);

    
function [CIJ] = makeringlatticeCIJ(N,K)
%MAKERINGLATTICECIJ     Synthetic lattice network
%
%   CIJ = makeringlatticeCIJ(N,K);
%
%   This function generates a directed lattice network with toroidal 
%   boundary counditions (i.e. with ring-like "wrapping around").
%
%   Inputs:     N,      number of vertices
%               K,      number of edges
%
%   Outputs:    CIJ,    connection matrix
%
%   Note: The lattice is made by placing connections as close as possible 
%   to the main diagonal, with wrapping around. No connections are made 
%   on the main diagonal. In/Outdegree is kept approx. constant at K/N.
%
%
%   Olaf Sporns, Indiana University, 2005/2007

% initialize
CIJ = zeros(N);
CIJ1 = ones(N);
KK = 0;
cnt = 0;
seq = 1:N-1;
seq2 = N-1:-1:1;

% fill in
while (KK<K)
    cnt = cnt + 1;
    dCIJ = triu(CIJ1,seq(cnt))-triu(CIJ1,seq(cnt)+1);
    dCIJ2 = triu(CIJ1,seq2(cnt))-triu(CIJ1,seq2(cnt)+1);
    dCIJ = dCIJ+dCIJ'+dCIJ2+dCIJ2';
    CIJ = CIJ + dCIJ;
    KK = sum(sum(CIJ));
end