How to transpose data so column A is grouped and works as a header for column b

IN L2 copied across

=IFERROR(INDEX($A:$A,AGGREGATE(15,6,ROW($A$2:$A$50)/(($A$2:$A$50<>"")*ISERROR(MATCH($A$2:$A$50,$K$2:K$2,0))),1)),"")

In L3 copied across and down

=IFERROR(INDEX($B:$B,AGGREGATE(15,6,ROW($B$2:$B$50)/(($B$2:$B$50<>"")*($A$2:$A$50=L$2)),ROWS(L$2:L2))),"")

It is an English word... but far from being a commonly used one!!

FILTER($B$2:$B$39,$A$2:$A$39=E$2)

copied across. In DK, you may need to use ; instead of ,

and this in E2 to return the names:

=TRANSPOSE(UNIQUE(A2:A39,FALSE))

an alternative solution is to Pivot your data in Power Query as shown in the Mcode below. One of the advantages of using PQ is that any updates to the source data is automatically reflected in the output once Refresh All is clicked.

Please Login or Register  to view this content.

Power Query is a free AddIn for Excel 2010 and 2013, and is built-in functionality from Excel 2016 onwards (where it is referred to as "Get & Transform Data").

It is a powerful yet simple way of getting, changing and using data from a broad variety of sources, creating steps which may be easily repeated and refreshed. I strongly recommend learning how to use Power Query - it's among the most powerful functionalities of Excel.

- Follow this link to learn how to install Power Query in Excel 2010 / 2013.

- Follow this link for an introduction to Power Query functionality.

- Follow this link for a video which demonstrates how to use Power Query code provided.

That's the beauty of Dyanmic arrays. If you have 100 unique names and 1,000,000 rows, the whole thing is completed by the calculation of 1+100 cells containing formulae. AGGREGATE is so versatile, but has many, many TIMES more calculations to perform to get there.