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Import or export text (.txt or .csv) files - Microsoft Support
There are two ways to import data from a text file with Excel: you can open it in Excel, or you can import it as an external data range. To export data from Excel to a text file, use the Save As command and change the file type from the drop-down …
RSQ function - Microsoft Support
An array or range of data points. Remarks. Arguments can either be numbers or names, arrays, or references that contain numbers. Logical values and text representations of numbers that you type directly into the list of arguments are counted.