Learn why the Excel AGGREGATE function fails with arrays and how to fix value errors using helper columns or dynamic LAMBDA and BYROW formulas.

Robert Kelly is managing director of XTS Energy LLC, and has more than three decades of experience as a business executive. He is a professor of economics and has raised more than $4.5 billion in ...

Kate Ellis, a former English professor who taught at Rutgers University in New Brunswick, New Jersey, for more than 40 years, says she started teaching as a way to have a positive impact on others. In ...