You have a SUMPRODUCT formula that works, but it is slow or hard to maintain. SUMPRODUCT calculates arrays in memory, which can slow down large workbooks. SUMIFS is faster and easier to read because it uses built-in conditional logic. This article explains why SUMPRODUCT becomes a performance problem and how to use Copilot in Excel … Read more
Excel’s Goal Seek tool finds the input value needed to achieve a target result in a formula. When you combine Goal Seek with Copilot, Copilot can automatically suggest which cell is the likely input cell. This removes guesswork when you have complex worksheets with many formulas. The suggestion is based on Copilot’s analysis of cell … Read more
Excel’s Stock and Geography linked data types pull real-time information from the web into your spreadsheet. You can enter a company name or country and convert it into a rich data object with dozens of attributes like market cap, population, or GDP. Copilot in Excel can now generate these data types automatically based on your … Read more
When you use Copilot in Excel to analyze data that references another workbook through a UNC path, you may see an error message or a blank result. Copilot cannot follow cross-workbook references that point to network shares like \\server\share\file.xlsx. This restriction exists because Copilot operates within the security boundaries of the current workbook and does … Read more
Spilled array formulas in Excel automatically fill adjacent cells based on the formula logic. When you work with these dynamic arrays across multiple sheets, Copilot can help you create, edit, and debug them. The challenge is that Copilot does not natively support cross-sheet array references in its natural language prompts. This article explains how to … Read more
When you ask Copilot in Excel to generate a slicer, the first step Copilot takes is detecting which fields exist in your data. This field list detection behavior determines whether Copilot can create the slicer or returns an error. Understanding this detection process helps you prepare your data correctly and avoid failed slicer generation attempts. … Read more
You have a table of actual versus budget figures and need a waterfall chart that shows how each variance contributes to the final total. Building this chart manually requires sorting data, calculating running totals, and inserting invisible placeholder series. Copilot in Excel can generate the chart directly from your variance data without manual setup. This … Read more
When you use Copilot in Excel with data stored in Data Model tables, you may notice that Copilot automatically detects and uses relationships between those tables. This behavior is called relationship inference. It allows Copilot to combine data from multiple tables without you manually defining every relationship. However, inference rules have specific limitations and may … Read more
You have a workbook where several VLOOKUP formulas pull data from multiple tables in sequence. Each step depends on the previous one, and now you need to trace backward from the final result to the original source value. Doing this manually requires rebuilding each formula and cross-referencing lookup tables. This article explains how to use … Read more
Business users often need to rearrange or extract specific columns and rows from large Excel tables without manually dragging data or writing complex formulas. The CHOOSECOLS and CHOOSEROWS functions, introduced in Excel 365, let you pick columns or rows by their numeric index directly within a formula. When combined with Copilot in Excel, you can … Read more