function mncombine( xx, yy, dataname, n )
output_xx = xx([dataname '1']);
output_yy = yy([dataname '1']);

for ii = 2:n
    [tempxx,tempyy] = mntrim(max(xx([dataname num2str(ii-1)])),max(xx([dataname num2str(ii)]))...
        ,xx([dataname num2str(ii)]),yy([dataname num2str(ii)]));
    output_xx = [output_xx;tempxx];
    output_yy = [output_yy;tempyy];
end
xx(dataname) = output_xx;
yy(dataname) = output_yy;


end