Removing 50% of class values: ? soft none ? none ? ? hard ? soft ? ? ? soft none none ? none none hard ? ? ? none
Removing examples with unknown class values: soft none none hard soft soft none none none none hard none


Removing 20% of values of 'age' and 50% of astigmatism:
['young', 'myope', 'no', 'reduced', 'none']
['young', 'myope', 'no', 'normal', 'soft']
['young', 'myope', 'yes', 'reduced', 'none']
['young', 'myope', 'yes', 'normal', 'hard']
['young', 'hypermetrope', '~', 'reduced', 'none']
['young', 'hypermetrope', 'no', 'normal', 'soft']
['young', 'hypermetrope', 'yes', 'reduced', 'none']
['young', 'hypermetrope', '~', 'normal', 'hard']
['~', 'myope', '~', 'reduced', 'none']
['pre-presbyopic', 'myope', '~', 'normal', 'soft']
['~', 'myope', '~', 'reduced', 'none']
['~', 'myope', '~', 'normal', 'hard']
['pre-presbyopic', 'hypermetrope', 'no', 'reduced', 'none']
['pre-presbyopic', 'hypermetrope', '~', 'normal', 'soft']
['pre-presbyopic', 'hypermetrope', 'yes', 'reduced', 'none']
['pre-presbyopic', 'hypermetrope', '~', 'normal', 'none']
['~', 'myope', '~', 'reduced', 'none']
['presbyopic', 'myope', '~', 'normal', 'none']
['presbyopic', 'myope', 'yes', 'reduced', 'none']
['presbyopic', 'myope', 'yes', 'normal', 'hard']
['presbyopic', 'hypermetrope', '~', 'reduced', 'none']
['~', 'hypermetrope', '~', 'normal', 'soft']
['presbyopic', 'hypermetrope', 'yes', 'reduced', 'none']
['presbyopic', 'hypermetrope', 'yes', 'normal', 'none']


Removing examples with unknown values
['young', 'myope', 'no', 'reduced', 'none']
['young', 'myope', 'no', 'normal', 'soft']
['young', 'myope', 'yes', 'reduced', 'none']
['young', 'myope', 'yes', 'normal', 'hard']
['young', 'hypermetrope', 'no', 'normal', 'soft']
['young', 'hypermetrope', 'yes', 'reduced', 'none']
['pre-presbyopic', 'hypermetrope', 'no', 'reduced', 'none']
['pre-presbyopic', 'hypermetrope', 'yes', 'reduced', 'none']
['presbyopic', 'myope', 'yes', 'reduced', 'none']
['presbyopic', 'myope', 'yes', 'normal', 'hard']
['presbyopic', 'hypermetrope', 'yes', 'reduced', 'none']
['presbyopic', 'hypermetrope', 'yes', 'normal', 'none']


Selecting examples with unknown values
['young', 'hypermetrope', '~', 'reduced', 'none']
['young', 'hypermetrope', '~', 'normal', 'hard']
['~', 'myope', '~', 'reduced', 'none']
['pre-presbyopic', 'myope', '~', 'normal', 'soft']
['~', 'myope', '~', 'reduced', 'none']
['~', 'myope', '~', 'normal', 'hard']
['pre-presbyopic', 'hypermetrope', '~', 'normal', 'soft']
['pre-presbyopic', 'hypermetrope', '~', 'normal', 'none']
['~', 'myope', '~', 'reduced', 'none']
['presbyopic', 'myope', '~', 'normal', 'none']
['presbyopic', 'hypermetrope', '~', 'reduced', 'none']
['~', 'hypermetrope', '~', 'normal', 'soft']
