I have two sheets Sheet Main and Sheet Unique
On sheet Main, I have a range of data with headers
On sheet Unique in cell A1 I have a drop-down of all the header names from sheet Main
In cell B1 of sheet Unique, I have the formula
=SUBSTITUTE(ADDRESS(A1,MATCH(A1,Main !A1:AA1,0),4),1,"")
Which gets the Column letter of the header on sheet Main from the dropdown on sheet Unique
Is cell A2 on sheet Unique I have the formula
=SORT(UNIQUE(TRANSPOSE(ARRAYFORMULA(TRIM(SPLIT(JOIN("|",Main!F2:F),"|"))))))
Which gets the unique list of elements from the column on sheet Main that was selected from the drop-down on sheet Unique.
In this case, F2:F is the range on sheet Main of the selected header from sheet Unique
I want to update the formula
=SORT(UNIQUE(TRANSPOSE(ARRAYFORMULA(TRIM(SPLIT(JOIN("|",Main!F2:F),"|"))))))
automatically every time I make a new selection from the Drop-down on the sheet Unique
Combing the two formulas I get and adding INDIRECT
=SORT(UNIQUE(TRANSPOSE(ARRAYFORMULA(TRIM(SPLIT(JOIN("|",Main!&INDIRECT(SUBSTITUTE(ADDRESS(Y1,MATCH(A1,Main!$A$1:$AA$1,0),4),1,""),"|"))))))))
I get the error formula parse error I can not get what I am doing wrong!
Thanks for any assistance
