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Affinity Analysis: Relative Rule Support Locate this document in the navigation structure

Key Figure Key Figure: 0RPA_RULESP

 

The (relative) support of a rule "Item B Follows from Item A" is calculated as follows:

Support (A —> B) = (Number of transactions that contain items A and B) / all transactions.

The rule support from A —> B is the probability that items A and B appear together in a transaction. The greater the rule support is, the more frequently are items A and b sold together.

This key figure can take values between 0 and 1.

Note Note

The following applies: Support (A —> B) = Support (B —> A). Together with the relative support of the premiss and conclusion, this key figure forms the basis for almost all objective interestingness measures of a rule (lift, confidence, conviction,...).

End of the note.

Technical Data

Available as of Release

BI_CONT 703 SP09

Aggregation

No

Exception Aggregation

No

Calculation

See above

Restriction

No