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 to use Excel’s PivotTable tool to turn data into meaningful information Your email has been sent Before Microsoft Excel added the PivotTable tool, you had to use summarizing functions and features ...

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 ...

For the Microsoft Power BI report designer, importing Microsoft Excel data is a common task. Once in Power BI, you analyze and report on that data. Occasionally, you might need to export a Power BI ...

Charlene Rhinehart is a CPA , CFE, chair of an Illinois CPA Society committee, and has a degree in accounting and finance from DePaul University. Vikki Velasquez is a researcher and writer who has ...