Tags / grouping
Finding Equal Row Sets Across Different Tables in SQL Server Using the FOR XML Trick or Alternative Approaches
Understanding Crosstabulation Limitations: How to Apply Ranges in R for Accurate Analysis
Data Tables in R: Efficiently Grouping and Printing
Using Melt to Loop Over a Vector in Data.table: Filtering and Summarizing with by
Getting Both Group Size and Min of Column B Grouping by Column A