Random Data with No Blanks and No Duplicates

HoneyBadger914

New Member
Joined
Aug 14, 2020
Messages
1
Office Version
  1. 365
Platform
  1. Windows
  2. MacOS
  3. Mobile
  4. Web
I am looking for a way to pull a random piece of data from a table, and skip the blanks and ensure there are no duplicates. The farthest I have gotten is by using <=INDEX('Sheet 1'!E8:G68,RANDBETWEEN(1,ROWS('Sheet 1'!E8:G68)),1), but this formula pulls the empty boxes. Not sure if this will pull duplicates, I haven't seen any yet. Thanks in advance!
 

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jasonb75

Well-known Member
Joined
Dec 30, 2008
Messages
12,491
Office Version
  1. 365
Platform
  1. Windows
Not something that I've tried (I don't personally have office 365 to test the filter function) but one that comes to mind

=INDEX(FILTER('Sheet 1'!$E$8:$E$68,'Sheet 1'!$E$8:$E$68<>""),RANDBETWEEN(1,COUNTIF('Sheet 1'!$E$8:$E$68,"?*")))

You might need to enter it as a legacy array by using Ctrl Shift Enter to prevent it from trying to spill.
 

Toadstool

Well-known Member
Joined
Mar 5, 2018
Messages
1,400
Office Version
  1. 2016
Platform
  1. Windows
Hi HoneyBadger914,

Your formula should work though you'll need to add a randomization for columns also, e.g.
=INDEX($E$8:$G$68,RANDBETWEEN(1,ROWS($E$8:$E$68)),RANDBETWEEN(1,COLUMNS($E$8:$G$8)))

Yes, this will produce duplicates. Approximately 50% of the time you'll get a duplicate by the 10th execution.

I can only think of a kludgy way of addressing this with multiple work columns, I've only got Excel 2016, so probably @jasonb75 has the better approach.
 

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