% create array that is able to hold the information
vtc_sizes = zeros(size(mdm.XTC_RTC, 1), 7);

% loop over the VTC files
for vtc_count = 1:size(vtc_sizes, 1)

    % read header
    h = xff(mdm.XTC_RTC{vtc_count, 1}, 'h');
    
    % copy header fields
    vtc_sizes(vtc_count, :) = ...
        [h.XStart, h.YStart, h.ZStart, h.XEnd, h.YEnd, h.ZEnd, h.Resolution];
end

% any size mismatch?
if any(any(diff(vtc_sizes)))

    % find out which one, taking the first as the norm
    for vtc_count = 2:size(vtc_sizes, 1)
        if any(vtc_sizes(vtc_count, :) ~= vtc_sizes(1, :))
            disp(sprintf('VTC file %s mismatches first file!', ...
                mdm.XTC_RTC{vtc_count, 1}));
        end
    end
end