# normalised all the index values to be in the range 0..1
# removed "stop words"
$docindex = {
    'Perl' => 1,
    'Python' => 0.5,
    'Rain' => 0.5,
    'Tuesday' => 0.5,
    'Wednesday' => 0.5,
    'Thursday' => 0.5,
    'Friday' => 0.5 
};

##</code><code>##

$docindex = {
    'Perl' => 1,
    'Python' => 0.5,
    ...
    '~~Course11' => 1 };