Mastering Group by and Conditional Count in R's dplyr Library: A Deep Dive

Finding Top n Elements in Pandas DataFrame Column by Keeping the Grouping

Using an "Or" Conditional in the `n_distinct` Function of Dplyr: A Flexible Approach to Summarize Counts for Multiple Conditions

How to Group Values of Different Columns into Time Buckets in Python Using Pandas

Understanding Missing Values in R Subset Dataframes: A Step-by-Step Guide