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In computer science, a lookup table (LUT) is an array that replaces runtime computation with a simpler array indexing operation, in a process termed as direct addressing.The savings in processing time can be significant, because retrieving a value from memory is often faster than carrying out an "expensive" computation or input/output operation. [1]
For example, the overall sum of a roll-up is just the sum of the sub-sums in each cell. Functions that can be decomposed in this way are called decomposable aggregation functions , and include COUNT, MAX, MIN, and SUM , which can be computed for each cell and then directly aggregated; these are known as self-decomposable aggregation functions.
When the computer calculates a formula in one cell to update the displayed value of that cell, cell reference(s) in that cell, naming some other cell(s), causes the computer to fetch the value of the named cell(s). A cell on the same "sheet" is usually addressed as: =A1 A cell on a different sheet of the same spreadsheet is usually addressed as:
By Jasper Ward (Reuters) - U.S. President-elect Donald Trump said on Monday he is going to meet Russian President Vladimir Putin "very quickly" after he takes office next week.
Over 95 million Americans are on alert for brutal cold temperatures in the coming days as arctic air plunges south across the country -- and a storm this weekend is expected to dump snow on ...
Dry January is the one month every year that sober-curious people consider their alcohol consumption behavior while they trade their boozy cocktails, spirits, wine and sparkling wine, hard cider ...
Microsoft Excel is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS.It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA).
Icon sets, which precede the text in a cell with an icon that represent some aspect of the value of the cell with respect to other values in a group of cells, can also be applied. Icons can be conditionally applied to show up only when certain criteria are met, such as a cross showing up on an invalid value, where the condition for invalidity ...