Cross-selling dei prodotti

Il piccolo minimarket ha deciso di fare cross-selling della gomma da masticare insieme a caffè, cereali o pane. Per capire quale dei tre articoli funzioni meglio, la proprietaria ha fatto un esperimento. Per una settimana ha venduto la gomma accanto alla cassa e ha registrato tutte le transazioni in cui è stata acquistata insieme a caffè, cereali o pane. Le transazioni di quel giorno sono disponibili come una lista di liste chiamata transactions. Ogni transazione è ['coffee','gum'], ['cereal','gum'] oppure ['bread','gum'].

Questo esercizio fa parte del corso

Analisi del carrello in Python

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Istruzioni dell'esercizio

Conta il numero di transazioni che contengono caffè e gomma.
Conta il numero di transazioni che contengono cereali e gomma.
Conta il numero di transazioni che contengono pane e gomma.

Esercizio pratico interattivo

Prova a risolvere questo esercizio completando il codice di esempio.

# Count the number of transactions with coffee and gum
coffee = transactions.count(['____', 'gum'])

# Count the number of transactions with cereal and gum
cereal = transactions.____(['cereal', 'gum'])

# Count the number of transactions with bread and gum
bread = transactions.____(['____', '____'])

# Print the counts for each transaction.
print('coffee:', coffee)
print('cereal:', cereal)
print('bread:', bread)

Modifica ed esegui il codice

Questo esercizio fa parte del corso

Analisi del carrello in Python

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In this chapter, you’ll learn the basics of Market Basket Analysis: association rules, metrics, and pruning. You’ll then apply these concepts to help a small grocery store improve its promotional and product placement efforts.

Exercise 1: Che cos’è la market basket analysis?Exercise 2: Le basi della market basket analysis Exercise 3: Cross-selling dei prodotti

Esercizio in corso

Exercise 4: Identificare le regole di associazione Exercise 5: Antecedenti e conseguenti multipli Exercise 6: Preparare i dati per la market basket analysis Exercise 7: Generare regole di associazione Exercise 8: La metrica più semplice Exercise 9: One-hot encoding dei dati di transazione Exercise 10: Calcolare la metrica di supporto

Association rules tell us that two or more items are related. Metrics allow us to quantify the usefulness of those relationships. In this chapter, you’ll apply six metrics to evaluate association rules: supply, confidence, lift, conviction, leverage, and Zhang's metric. You’ll then use association rules and metrics to assist a library and an e-book seller.

Exercise 1: Confidence and lift Exercise 2: Recommending books with support Exercise 3: Refining support with confidence Exercise 4: Further refinement with lift Exercise 5: Leverage and conviction Exercise 6: Lift versus leverage Exercise 7: Computing conviction Exercise 8: Computing conviction with a function Exercise 9: Promoting ebooks with conviction Exercise 10: Association and dissociation Exercise 11: Computing association and dissociation Exercise 12: Defining Zhang's metric Exercise 13: Applying Zhang's metric Exercise 14: Advanced rules Exercise 15: Filtering with support and conviction Exercise 16: Using multi-metric filtering to cross-promote books

The fundamental problem of Market Basket Analysis is determining how to translate vast amounts of customer decisions into a small number of useful rules. This process typically starts with the application of the Apriori algorithm and involves the use of additional strategies, such as pruning and aggregation. In this chapter, you’ll learn how to use these methods and will ultimately apply them in exercises where you assist a retailer in selecting a physical store layout and performing product cross-promotions.

Exercise 1: Aggregation Exercise 2: Performing aggregation Exercise 3: Defining an aggregation function Exercise 4: The Apriori algorithm Exercise 5: Pruning and Apriori Exercise 6: Identifying frequent itemsets with Apriori Exercise 7: Selecting a support threshold Exercise 8: Basic Apriori results pruning Exercise 9: Generating association rules Exercise 10: Pruning with lift Exercise 11: Pruning with confidence Exercise 12: Advanced Apriori results pruning Exercise 13: Aggregation and filtering Exercise 14: Applying Zhang's rule Exercise 15: Advanced filtering with multiple metrics

In this final chapter, you’ll learn how visualizations are used to guide the pruning process and summarize final results, which will typically take the form of itemsets or rules. You’ll master the three most useful visualizations -- heatmaps, scatterplots, and parallel coordinates plots – and will apply them to assist a movie streaming service.

Exercise 1: Heatmaps Exercise 2: Visualizing itemset support Exercise 3: Heatmaps with lift Exercise 4: Interpreting heatmaps Exercise 5: Scatterplots Exercise 6: Pruning with scatterplots Exercise 7: Optimality of the support-confidence border Exercise 8: Parallel coordinates plot Exercise 9: Using parallel coordinates to visualize rules Exercise 10: Refining a parallel coordinates plot Exercise 11: Congratulations!