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% 1. Title: Database for fitting contact lenses
%
% 2. Sources:
% (a) Cendrowska, J. "PRISM: An algorithm for inducing modular rules",
% International Journal of Man-Machine Studies, 1987, 27, 349-370
% (b) Donor: Benoit Julien (Julien@ce.cmu.edu)
% (c) Date: 1 August 1990
%
% 3. Past Usage:
% 1. See above.
% 2. Witten, I. H. & MacDonald, B. A. (1988). Using concept
% learning for knowledge acquisition. International Journal of
% Man-Machine Studies, 27, (pp. 349-370).
%
% Notes: This database is complete (all possible combinations of
% attribute-value pairs are represented).
%
% Each instance is complete and correct.
%
% 9 rules cover the training set.
%
% 4. Relevant Information Paragraph:
% The examples are complete and noise free.
% The examples highly simplified the problem. The attributes do not
% fully describe all the factors affecting the decision as to which type,
% if any, to fit.
%
% 5. Number of Instances: 24
%
% 6. Number of Attributes: 4 (all nominal)
%
% 7. Attribute Information:
% -- 3 Classes
% 1 : the patient should be fitted with hard contact lenses,
% 2 : the patient should be fitted with soft contact lenses,
% 1 : the patient should not be fitted with contact lenses.
%
% 1. age of the patient: (1) young, (2) pre-presbyopic, (3) presbyopic
% 2. spectacle prescription: (1) myope, (2) hypermetrope
% 3. astigmatic: (1) no, (2) yes
% 4. tear production rate: (1) reduced, (2) normal
%
% 8. Number of Missing Attribute Values: 0
%
% 9. Class Distribution:
% 1. hard contact lenses: 4
% 2. soft contact lenses: 5
% 3. no contact lenses: 15
@relation contact-lenses
@attribute age {young, pre-presbyopic, presbyopic}
@attribute spectacle-prescrip {myope, hypermetrope}
@attribute astigmatism {no, yes}
@attribute tear-prod-rate {reduced, normal}
@attribute contact-lenses {soft, hard, none}
@data
%
% 24 instances
%
young,myope,no,reduced,none
young,myope,no,normal,soft
young,myope,yes,reduced,none
young,myope,yes,normal,hard
young,hypermetrope,no,reduced,none
young,hypermetrope,no,normal,soft
young,hypermetrope,yes,reduced,none
young,hypermetrope,yes,normal,hard
pre-presbyopic,myope,no,reduced,none
pre-presbyopic,myope,no,normal,soft
pre-presbyopic,myope,yes,reduced,none
pre-presbyopic,myope,yes,normal,hard
pre-presbyopic,hypermetrope,no,reduced,none
pre-presbyopic,hypermetrope,no,normal,soft
pre-presbyopic,hypermetrope,yes,reduced,none
pre-presbyopic,hypermetrope,yes,normal,none
presbyopic,myope,no,reduced,none
presbyopic,myope,no,normal,none
presbyopic,myope,yes,reduced,none
presbyopic,myope,yes,normal,hard
presbyopic,hypermetrope,no,reduced,none
presbyopic,hypermetrope,no,normal,soft
presbyopic,hypermetrope,yes,reduced,none
presbyopic,hypermetrope,yes,normal,none
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