Class Lift
- java.lang.Object
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- elki.itemsetmining.associationrules.interest.Lift
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- All Implemented Interfaces:
InterestingnessMeasure
@Reference(authors="S. Brin, R. Motwani, C. Silverstein", title="Beyond market baskets: Generalizing association rules to correlations", booktitle="ACM SIGMOD Record 26", url="https://doi.org/10.1145/253260.253327", bibkey="DBLP:conf/sigmod/BrinMS97") public class Lift extends java.lang.Object implements InterestingnessMeasure
Lift interestingness measure.\[ \tfrac{\text{confidence}(X\rightarrow Y)}{\text{support}(Y)} = \tfrac{\text{confidence}(Y\rightarrow X)}{\text{support}(X)} = \tfrac{P(X\cap Y)}{P(X)P(Y)} \]
Reference:
S. Brin, R. Motwani, C. Silverstein
Beyond market baskets: Generalizing association rules to correlations
In ACM SIGMOD Record 26- Since:
- 0.7.5
- Author:
- Frederic Sautter
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Constructor Summary
Constructors Constructor Description Lift()
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description double
measure(int t, int sX, int sY, int sXY)
Computes the value of the measure for a given support values
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Method Detail
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measure
public double measure(int t, int sX, int sY, int sXY)
Description copied from interface:InterestingnessMeasure
Computes the value of the measure for a given support values- Specified by:
measure
in interfaceInterestingnessMeasure
- Parameters:
t
- Total number of transactionsX
- Support of the antecedentsY
- Support of the consequentsXY
- Support of the union of antecedent and consequent- Returns:
- value of the measure
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