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Data-warehousing-and-data-mining-10IS74-10CS755-->View question

Asked On2017-05-17 18:23:14 by:pallaviaithaln

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Using IF-THEN Rules for Classification Rules are a good way of representing information or bits of knowledge.
A rule-based classifier uses a set of IF-THEN rules for classification.
An IF-THEN rule is an expression of the form IF condition
THEN conclusion.
An example is rule R 1,R1: IF age =youth AND student=yes
THEN buys computers=yes.
The “IF”-part (or left-hand side) of a rule is known as the rule antecedent or precondition.
The “THEN”-part (or right-hand side) is the rule consequent. In the rule antecedent, the condition consists of one or more attribute tests (such as age= youth, and student=yes) that are logically ANDed.
The rule’s consequent contains a class prediction (in this case, we are predicting whether a customer will buy a computer).
R 1 can also be written as R1: (age=youth)
^ (
buys computer
If the condition (that is, all of the attribute tests) in a rule antecedent holds true for a given tuple,
we say that the rule antecedent is satisfied (or simply, that the rule is satisfied) and that the rule
covers the tuple.

Answerd on:2015-01-20 Answerd By:pallaviaithaln

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