function [matrix] = SaveIntMatrixToFile(fullFileName, matrix, numNodes)

n = size(matrix,1);
m = size(matrix,2);

fileID = fopen(fullFileName,'w');

if nargin >= 3
    fprintf(fileID,'%%Nodes\t%d\n',numNodes);
end

for i=1:n
    for j=1:m
        fprintf(fileID,'\t%d',matrix(i,j));
    end
    fprintf(fileID,'\n');
end

fclose(fileID);