Forum Discussion
Formulas Challenge for 365
Thank you for reading this post!
I propose a formulas challenge (The shorter the better). Attached is a workbook in need of two formulas. I have solutions for each (Formula 1 is 66 characters, Formula 2 is 72) but would like to compare notes with others and maybe learn some new things.
Formula 1: Rollup data from 5 sheets. Must be sorted A-Z, no blank rows, and must include header.
Formula 2: Find the j+ max for each agent. This sounds simple but you'll have to see the workbook. The arrangement is based off a client's workbook that crossed my desk several years ago.
The rules are simple. For this challenge the following are restricted: vba, PowerQuery, fill handle, use of named items, and alteration of existing data. Functions available on the Beta channel are fair game.
Note:
You may find this exercise difficult if you're not on 365 with Insider. The goal of this exercise is to explore some of the newest functions Excel has to offer. Have at it!
15 Replies
I'm re-attaching #2. After some thought, I recall the client's data was much "worse". It was arranged as such:
I have attempted part 1 of your challenge but not within the rules. I only use defined names to reference data (at one time I ran macros to delete the content of any cell that contained a direct reference1).
My approach was to create an array of Thunks, each element containing the data from one of the tables.
Since submitting, I have had a look at Riny_van_Eekelen 's solution and may have some reconsidering to do. I had not realised that VSTACK works over a 3D range reference! It does mean that the tables have to be aligned but often they are.
- This is a fascinating approach! Thank you for sharing. With access to all these functions, this is essentially vba at the sheet level but much more accessible (DROP/TAKE are the equivalents to .resize, etc.). I was testing VSTACK the other day and was surprised to see it (and HSTACK) support 3D references. Very cool.
This page will have to be updated soon:
https://support.microsoft.com/en-us/office/create-a-3-d-reference-to-the-same-cell-range-on-multiple-worksheets-40ca91ff-9dcb-4ad1-99d2-787d0bc888b6"VSTACK ... support 3D references. Very cool."
Yes, that was quite a discovery. Stay in touch over the results of further exploration. Although this forum is largely devoted to Q&A, I would like to see more discussion and sharing of experience.
You can see from my response that I am not fully committed to the shortest formula concept, including 44 spaces and 6 line feeds in a formula of length 123 definitely rates a 'could do better'! I have also used thunks in the Max problem as a device for getting 2 row arrays through MAP. The more obvious BYROW does not allow multiple parameters.
The final version of you Max problem is more comfortable for me because I am used to picking out arrays from multidimensional layouts.
As for your comment regarding VBA, last week on another forum, I wrote a formula which turned out to be needed because an add-in had ceased to work. The places where I would still need VBA include writing event handlers or using the object model to interrogate relationships between shape objects. Most calculation would appear to be better achieved through the use of worksheet formulae.
Patrick2788 A short formula isn't always best :))
For number 1 I could come up with this (at 72 char):
=VSTACK('1'!A1:B1,TAKE(SORT(VSTACK('1:5'!A2:B30)),COUNTA('1:5'!A2:A30)))I feel that there must be a better way to exclude the blanks asThe COUNTA at the end looks a bit clumsy. And if you hadn't insisted on a formula generated header, the count would have come down to 54 chars.
- I used DROP and UNIQUE to take care of the blank.
=VSTACK('1'!A1:B1,DROP(SORT(UNIQUE(VSTACK('1:5'!A1:B30)),1,1),-1))
Patrick2788 Formula 2 (57 characters) could be:
=IFERROR(BYROW(B2:J16*(B1:J15="j+"),LAMBDA(a,MAX(a))),"")- Are you able to use it to find the j+ max for each agent?
- I get the expected results.
