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Querying Active Users: How to Identify Returning Customers Within 7 Days of Their First Purchase

Deleting Extra Characters from DataFrames in R: A Step-by-Step Solution

Transforming Longitudinal Data for Time-to-Event Analysis in R: Simplifying Patient Conversion Handling

Mastering Composite Functions with mutate_at: A Comprehensive Guide

Adding New Rows to a Pandas DataFrame with Timestamp Intervals

Creating New Rows and Flagging Existing Data in R Using Dplyr Library