The SCAN function in Excel is a powerful tool that allows you to apply a custom calculation to each element in an array or range. It then returns an array containing the intermediate values created during the scan. Here’s how it works:
1. Syntax:
=SCAN([initial_value], array, lambda)
initial_value (optional): The starting value for the accumulator.
array: The array you want to scan.
lambda: A custom LAMBDA function to apply to each element in the array.
2. Use Cases:
Running Totals: You can use SCAN to create running totals by accumulating values as you move through the array.
Running Counts: Similarly, you can count occurrences or track other intermediate results.
Incremental Calculations: SCAN is useful for any calculation that requires intermediate steps.
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