For some data.table users, “dot-SD” is a bit of a mystery. But data.table creator Matt Dowle told me that it’s actually quite simple: Just think of it as a symbol representing “each group.” Let’s go ...

How do I do that in data.table? Find code for dozens of data tasks in this searchable cheat sheet of R data.table and Tidyverse code. Speed. Concise syntax. Backwards compatibility. But especially ...

How to show details in a grouped PivotTable in Microsoft Excel Your email has been sent Microsoft Excel PivotTables turn data into useful information the same as other reporting tools. Most reports ...

Have you ever found yourself staring at multiple Excel tables, wondering how to make sense of the scattered data? Whether you’re managing sales reports, tracking inventory, or analyzing performance ...

Q. You explained Excel’s Scenario Manager in your November 2024 Tech Q&A article and Goal Seek in your December 2024 Tech Q&A article. Can you please explain the final What-If Analysis tool: Data ...