vba - Count unique values in Excel

Question

I need to count unique values in range (C2:C2080) in excel. Googled formula:

=SUM(IF(FREQUENCY(MATCH(C2:C2080;C2:C2080;0);MATCH(C2:C280;C2:C2080;0))>0;1)) 

return incorrect value.

UPD: Lame solution:

Sub CountUnique()

Dim i, count, j As Integer

count = 1
For i = 1 To 470
    flag = False
    If count > 1 Then
        For j = 1 To count
            If Sheet1.Cells(i, 3).Value = Sheet1.Cells(j, 11).Value Then
                flag = True
            End If
        Next j
    Else
        flag = False
    End If

    If flag = False Then
        Sheet1.Cells(count, 11).Value = Sheet1.Cells(i, 3).Value
        count = count + 1
    End If

Next i

Sheet1.Cells(1, 15).Value = count

End Sub

Answer 1

Here is a VBA function that works for me.

You can use it as a worksheet function, referencing any range, eg “=CountUnique(N8:O9)”

It handles text and numeric values, and treats blank cells as one value

It does not require dealing with array functions.

It requires a reference to the Microsoft Scripting Library, for the dictionary object.

    Public Function CountUnique(rng As Range) As Integer
        Dim dict As Dictionary
        Dim cell As Range
        Set dict = New Dictionary
        For Each cell In rng.Cells
             If Not dict.Exists(cell.Value) Then
                dict.Add cell.Value, 0
            End If
        Next
        CountUnique = dict.Count
    End Function