Traditional PivotTables have always intimidated me. I see there is a new Excel function called PIVOTBY. What is the ...

dplyr join functions, and the speedy data.table package. R has a number of quick, elegant ways to join data frames by a common column. I’d like to show you three of them: Includes R scripts ...

Make your R data.table code more efficient and elegant with these special symbols and operators. Plus, learn about the new fcase() function R data.table code becomes more efficient — and elegant ...

Mary Ann Richardson shows you what do to if you have to perform that function periodically. While Access 2003 and 2002 include a wizard for importing data from an Excel file into an Access table ...