Get Unique Value list in excel - excel

Question

I am quite novice at Excel formulas, so could anyone help me
I have elements as follows
+----+---------+------------+
| A | B | C |
| nr | car | model |
| 1 | Ford | Mustang |
| 2 | Ford | Focus |
| 3 | Ford | Focus |
| 4 | Ferrari | 458 |
| 5 | Ferrari | Testarossa |
+----+---------+------------+
How could I get the results as follows
+---+---------+-----------------+
| 1 | Ford | Mustang, Focus |
| 2 | Ferrari | 458, Testarossa |
+---+---------+-----------------+
Where every value is unique. I Tried Vlookup, but it only returns 1 element with 1 value. Example: VLookup with Ford would return only the first result Mustang, but not Focus
If possible, please use only Formulas :)
I've seen similar questions but no answers

Answer 1

Now if you don't mind them being in different cells then:
=IFERROR(INDEX($C$2:$C$6,MATCH(1,IF(($B$2:$B$6=$F1)*(COUNTIF($F1:F1,$C$2:$C$6)=0),1,0),0)),"")
This is an array formula and as such must be confirmed with Ctrl-Shift-Enter instead of Enter or Tab to exit edit mode.

Answer 2

This can be done in an extra step. As in you will need an intermediate table.
So in my example, I take the data you have given (which seems sorted for Column car), but assume that it is not sorted (unsorted data in the screenshot).
Step 1:
Unsorted data is sorted, and table formed in rows 9-14. Add a column in D9, and in cell D10 put this formula:
=IF(B10=B9,CONCATENATE(VLOOKUP(B9,B9:D10,3,0),", ",C10),C10)
What this formula does is it looks up and concatenates values at the same time.
I find no of unique entries in the table in rows 9 and 14 with a formula in row 16. (This is just for convenience)
B16 =SUMPRODUCT(1/COUNTIF($B$10:$B$14,$B$10:$B$14))
Step 2:
In rows 18-20 (the no of unique entries kind of gave an idea how big this table will be),
B19=INDEX($B$10:$B$14,MATCH(0,INDEX(COUNTIF($B$18:B18,$B$10:$B$14),0,0),0))
This formula lists out unique car names in colB. In colC, you LOOKUP the last concatenated value for a car name (because we had kept on concatenating earlier, the last entry for a car name would have your result)
C19=LOOKUP(2,1/($B$9:$B$14=B19),$D$9:$D$14)
That should give you the resultant table! (Have pasted all of them as values in colG onwards so that you see the output)

Answer 3

Put this in D2
=IF(B2<>B1,C2,IF(C2<>C1,IF(D1="",C2,D1&", "&C2),""))
Drag down
nr car model ColD
1 Ford Mustang Mustang
2 Ford Focus Mustang, Focus
3 Ford Focus
4 Ferrari 458 458
5 Ferrari Testarossa 458, Testarossa
first occurrence of the last model per car has the data you want.
This would be a lot easier if you could kill column A and use Excel's remove dupes function.
If you want to do it with code, this will work:
Sub ConcatByMasterColumn()
Dim X As Long, MyString As String
Range("F1:G1").Formula = Array("Car", "Model")
For X = 2 To Range("A" & Rows.Count).End(xlUp).Row + 1
If Range("B" & X) <> Range("B" & X - 1) And X > 2 Then 'MyString = Range("B" & X).Text
Range("F" & Range("F" & Rows.Count).End(xlUp).Offset(1, 0).Row).Formula = Range("B" & X - 1).Text
Range("G" & Range("G" & Rows.Count).End(xlUp).Offset(1, 0).Row).Formula = Right(MyString, Len(MyString) - 2)
MyString = ""
End If
If Range("C" & X) <> Range("C" & X - 1) Then MyString = MyString & ", " & Range("C" & X).Text
Next
End Sub
Results:
Car Model
Ford Mustang, Focus
Ferrari 458, Testarossa