📊Analyse de donnéesIntermediateAll AIs

Perform cohort analysis

Analyze user retention by cohort

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Write Python code to perform cohort retention analysis on a user events DataFrame with columns: user_id, event_date, and event_type. Define cohorts by first purchase month, calculate monthly retention rates, and visualize as a heatmap. Export results to a pandas pivot table.

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Analyze user retention by cohort

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