我想要 VLOOKUP，但我希望能够看到“第 n”个唯一结果，而不仅仅是第一个

Question

我想在 vba 中创建一个 Excel 函数，其工作方式与 VLOOKUP 相同，但有一个额外的参数让您选择第 n 个唯一结果。

这是迄今为止我想出的非工作代码。它不起作用，而且有点不完整，但我想你可以看到我要去的地方。

Function MVLOOKUP(lookup_value, table_array As Range, col_index_num As Long, entry_num As Long, Optional range_lookup As Boolean) As Variant
    '===========================
    'Purpose: VLOOKUP but it finds ALL the matching entries, not just the first one.
    'returns the entry you want by its number, starting at one
    'entry_num is the entry to return
    'most of this copied from top answer on this stackoverflow entry
    '/sf/ask/1447338231/
    
        Dim FoundCell As Range
        Dim LastCell As Range
        Dim FirstAddr, find_value As String
        Dim rFound As Variant
        Dim strFound() As String
        
        Dim my_range As Range
        Dim row_count, col_count As Long
        Dim vLookAt As Integer
        
        
        col_count = table_array.Columns.Count
        find_value = lookup_value

        
        If col_index_num >= 0 Then      'sets range to do only be 1 column wide???
            Set my_range = table_array.Resize(, 1)
        Else
            Set my_range = table_array.Resize(, 1).Offset(0, col_count - 1)
        End If
        
        With my_range 'no idea why this is here
            row_count = .Cells.Count
            If row_count = 1048576 Then row_count = .Cells(.Cells.Count).End(xlUp).Row
        End With
        
        Set my_range = my_range.Resize(row_count)
        Set LastCell = my_range.Cells(my_range.Cells.Count)
        
        If IsMissing(range_lookup) Or range_lookup Then
            vLookAt = 2 'xlPart
            
        Else
            vLookAt = 1 'xlWhole
        
        End If
'        If IsMissing(range_lookup) Or range_lookup Then
'            Set FoundCell = my_range.Find(what:=find_value, after:=LastCell, LookIn:=xlFormulas, _
'                                LookAt:=xlPart, SearchOrder:=xlByRows, SearchDirection:=xlNext, _
'                                MatchCase:=False, SearchFormat:=False)
'        Else
'            Set FoundCell = my_range.Find(what:=find_value, after:=LastCell, LookIn:=xlFormulas, _
'                                LookAt:=xlWhole, SearchOrder:=xlByRows, SearchDirection:=xlNext, _
'                                MatchCase:=False, SearchFormat:=False)
'        End If
        
        Set FoundCell = my_range.Find(what:=find_value, after:=LastCell, LookIn:=xlValues, _
                                LookAt:=vLookAt, SearchOrder:=xlByRows, SearchDirection:=xlNext, _
                                MatchCase:=False, SearchFormat:=False)
                                
        If Not FoundCell Is Nothing Then 'We found something!
            i = 0
            rFound(i) = FoundCell.Address
            
            
            strFound(i) = rFound(i).Offset(0, col_index_num - 1)
            
            If IsNumeric(col_index_num) And Abs(col_index_num) <= col_count Then
               'search, if found, search (for each) current array,
                
                    Do
                        'probably should just set last cell at the end of every loop? or use MSDN example for findnext??????
                        Set FoundCell = my_range.FindNext(after:=rFound(i))

                        rFound(i) = FoundCell.Address
                        
                        If rFound(i) = rFound(0) Then
                            MVLOOKUP = CVErr(xlErrNA)
                            Exit Function
                        End If
                       
                        
                        If NewElem(rFound(i).Value, strFound()) Then      'only iterate i if there was a new element
                            
                            strFound(i) = rFound(i).Offset(0, col_index_num - 1)
                            i = i + 1
                            
                        End If
                        
                                                
                    Loop While i < entry_num        'entry_num starts at 1, but array starts at 0
        
                    MVLOOKUP = strFound(entry_num - 1)
                    
                    Exit Function
            Else            'Returns #REF excel error if there's an error in the column reference
                MVLOOKUP = CVErr(xlErrRef)
                Exit Function
            End If
        Else        'Returns #N/A if notthing found
            MVLOOKUP = CVErr(xlErrNA)
            Exit Function
        End If

End Function

Function NewElem(strCheck As String, myArray() As String) As Boolean
'    For i = LBound(myArray) To UBound(myArray) - 1
'        If strCheck = myArray(i) Then
'            IsInArray = True
'            Exit Function
'        End If
'    Next i
    For Each i In strCheck()
        myArray() = Filter(myArray, strCheck, compare:=vbTextCompare)
        
        If (UBound(myArray) - LBound(myArray) + 1) > 0 Then
            NewElem = True
            Exit Function
        End If
    Next
    NewElem = False
End Function

Answer 1

对于最新版本的 Excel，您可以使用 INDEX/FILTER 来实现此目的：

F15 单元格中的公式：

=INDEX(FILTER($C$2:$C$18,$B$2:$B$18=$E$15),$E$16)

其中查找值位于 E15 中，第 n 项的 n 位于 E16 中。