TAILIEUCHUNG - Data Mining and Knowledge Discovery Handbook, 2 Edition part 65

Data Mining and Knowledge Discovery Handbook, 2 Edition part 65. Knowledge Discovery demonstrates intelligent computing at its best, and is the most desirable and interesting end-product of Information Technology. To be able to discover and to extract knowledge from data is a task that many researchers and practitioners are endeavoring to accomplish. There is a lot of hidden knowledge waiting to be discovered – this is the challenge created by today’s abundance of data. Data Mining and Knowledge Discovery Handbook, 2nd Edition organizes the most current concepts, theories, standards, methodologies, trends, challenges and applications of data mining (DM) and knowledge discovery. | 620 Maria Halkidi and Michalis Vazirgiannis Interestingness Measures of Classification Rules The number of classification patterns generated could be very large and it is possible that different approaches do result in different sets of patterns. The patterns extracted during the classification process could be represented in the form of rules known as classification rules. It is important to evaluate the discovered patterns identifying these ones that are valid and provide new knowledge. Techniques that aim at this goal are broadly referred to as interestingness measures. The interestingness of the patterns that discovered by a classification approach could also be considered as another quality criterion. Some representative measures Hilder-man and Hamilton 1999 for ranking the usefulness and utility of discovered classification patterns classification rules are Rule-Interest Function. Piatetsky-Shapiro introduced the rule-interest Piatetsky-Shapiro 1991 that is used to quantify the correlation between attributes in a classification rule. It is suitable only for the single classification rules . the rules whose both the left- and right-hand sides correspond to a single attribute. Smyth and Goodman s J-Measure. The J-measure Smyth and Goodman 1991 is a measure for probabilistic classification rules and is used to find the best rules relating discretevalued attributes. A probabilistic classification rule is a logical implication X Y satisfied with some probability p. The left- and right-hand sides of this implication correspond to a single attribute. The right-hand side is restricted to simple single-valued assignment expression while the left-hand-side may be a conjunction of simple expressions. General Impressions. In Liu et al. 1997 general impression is proposed as an approach for evaluating the importance of classification rules. It compares discovered rules to an approximate or vague description of what is considered to be interesting. Thus a general

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