function runcompare (path, first, last)

for n = first:last-1
    str = form(n);
    path1 = [path, '.', str];
    
    str = form(n+1);
    path2 = [path, '.', str];    
    
    compare( path1, path2 );
end
    
    
    
    
function str = form ( in )
% str = form ( in )
% in : numerical input such as 52 or 4
% str character string output of length three such as '052' or '004'
%
% convert 'in' to a 3 digit string
% ex:   5 --> '005' ,   13 --> '013' , 324 --> '324'

if (in < 10)
    str = ['00',int2str(in)];
elseif (in < 100)
    str = ['0',int2str(in)];
else
    str = int2str(in);
end