Diagnostic daytime multiple sleep latency test (MSLT) is used to diagnose narcolepsy and to measure the degree of daytime sleepiness. It measures how quickly you fall asleep in quiet situations during the day. It also monitors how quickly and how often you enter REM sleep.
Array formulas provide a way by which Excel users can discover such useful information. To explain the power of array formulas I'll use this database. It shows sales by Seller, Product, Region, and Customer, with Quantity and Total Sales, in dollars. I named each column of data with the label shown in row 1.
Is there a way to use a name range as an array criteria for a sum(countif()) formula in Excel 2010. up vote 2 down vote favorite. Picture column A full of comments like feedback from a survey question. Now picture column B with a formula which counts occurrances of particular key words within each comment.