Confidence
Confidence is the conditional proportion of transactions containing an association rule’s consequent among those containing its antecedent.
Data Without Labels
Confidence is the conditional proportion of transactions containing the consequent among those containing the antecedent of an association rule.
- How it is used
- Shortlists association rules for market basket decisions by measuring how often a consequent appears when its antecedent appears.
- How deep it goes
- Defines confidence through transaction counts and demonstrates threshold tuning in Apriori; does not develop statistical uncertainty.
- Examples
- Uses five grocery invoices for rule calculations and a Python store dataset for filtering and inspecting generated rules.
- What you can do after
- Apply it via apyori to filter candidate rules, then interpret confidence alongside support and lift.
Advanced Algorithms and Data Structures
Confidence is the conditional frequency with which one product is purchased when another product is purchased.
- How it is used
- Supports product association measurement, group merging, and follow-up recommendations in non-personalized e-commerce systems.
- How deep it goes
- Defines the conditional-frequency calculation and applies thresholds, but stops short of detailed recommender-system implementation.
- Examples
- Uses laptops with external disks, tennis rackets with tennis balls, and follow-up product suggestions.
- What you can do after
- Apply confidence by counting co-purchases, calculating conditional frequency, and thresholding associations for recommendations.
Read how Advanced Algorithms and Data Structures explains confidence →
Related concepts
- association rule miningmeasures · Association rule mining is a data-mining technique that discovers relationships or implications among items, events, or categorical values based on their co-occurrence.
- edgemeasures · An edge is a graph connection between two vertices that represents a relationship and may be directed, labeled, or weighted.
- confidencecontrasts with · Confidence is a degree of certainty or assurance associated with a judgment, estimate, prediction, capability, or statistical procedure, often expressed as a score, probability, or coverage level.
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