In the following table, I'd like to concatenate the numbers of column B, according to string in column A:
For example, all the numbers adjacent to XX
would be copied to another cell in this format: 12, 12, 21, 23, 31, 32
.
I can manually concatenate the whole of column B using:
=ArrayFormula(concatenate(B2:D&", "))
But I need to split those values according to column A.
I can manipulate this data in Google Sheets, Excel or Numbers.