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Looking up when the data won’t co-operate (case study)
Published on Nov 4, 2014 in Excel Challenges, Excel Howtos
![Looking up when the data won’t co-operate (case study)](https://img.chandoo.org/f/2d-lookup-problem-data-structure.png)
Occasionally we deal with data that is so uncooperative that we might as well give up and go back to calculators & ledger books.
Recently I found myself in such a situation and learned something new.
Introducing … data that won’t play nice
Drum roll please. Here is a data-set that I got from somewhere.
The problem – build a lookup formula
And the problem. Oh, simple. Write a lookup formula to find how many customer walk-ins we have on any given day.
But how?
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