7 articles tagged #Array Operations
Your SUMIFS formula looks right, but it returns zero the moment you swap a cell reference for an array constant like {"North","South"}. Here's exactly why that happens and four reliable ways to fix it.
Getting a #VALUE! error from XLOOKUP when your return array spans multiple columns? This is a common spill behavior trap. Learn exactly why it happens and how to fix it in a few keystrokes.
Your INDEX MATCH formula works fine on a single column but throws #VALUE! the moment you extend it across multiple columns. Here's exactly why that happens and the precise fixes to make it work.
If SUMPRODUCT suddenly throws #VALUE! the moment you reference a second sheet, you're not alone. This guide explains exactly why multi-sheet ranges break SUMPRODUCT and gives you working alternatives that actually produce the right totals.
SUMPRODUCT is supposed to multiply and sum your arrays in one shot, but the moment a text value sneaks in, the total goes wrong with no error to warn you. Here's exactly why it happens and how to fix it.
Your SUMPRODUCT formula looks right, your data looks right, yet the result is stubbornly zero. This guide breaks down every common cause — from mismatched array sizes to text-stored numbers — and shows you exactly how to fix each one.
Learn why NumPy broadcasting mismatches can produce silently incorrect calculations, how broadcasting rules work, and practical techniques for detecting and preventing costly data processing errors.