Excel宏按组

Question

表格示例

  column1     | column2 |  column3
    --------------------------------------------
              |         |
      A       |     1   |  
      A       |     2   |  
      A       |     3   |
              |         | 
      B       |     4   |  
      B       |     4   |
              |         | 
      C       |     1   |  
      C       |     1   |  
      C       |     5   |  

如您所见，它们被分组在第一列中，第二列是一些值。 我不了解VB，而且一个多小时都无法自己弄清。

我想做的事：

对于每个组：

计算有多少个值小于2。

如果有1个或多个这样的值，请将组上方空白行中的column3设置为(numbers of values under 2 in group / total number of values in group)组中(numbers of values under 2 in group / total number of values in group)

如果没有，则什么也不做。

上表的输出为：

  column1     | column2 |  column3
    --------------------------------------------
              |         |   1/3
      A       |     1   |  
      A       |     2   |  
      A       |     3   |
              |         | 
      B       |     4   |  
      B       |     4   |
              |         |   2/3
      C       |     1   |  
      C       |     1   |  
      C       |     5   |  

Answer 1

进行一些假设（假设您的列号与示例中的相同，并且组之间始终有空白行，下面是一个摘要片段：

Sub Test2()
Dim LastRow As Integer, First As Integer, Last As Integer
LastRow = ActiveSheet.Cells.Find("*", SearchOrder:=xlByRows, SearchDirection:=xlPrevious, After:=[A1]).Row + 1
First = 3
For i = 3 To LastRow
    If Cells(i, 1).Value = "" Then
        Last = i - 1
        Cells(First - 1, 3).Value = Summ(First, Last)
        First = i + 1
    End If
Next i
End Sub
Private Function Summ(First As Integer, Last As Integer)
Dim Count As Integer, Total As Integer
For t = First To Last
    Total = Total + 1
    If Cells(t, 2).Value < 2 Then Count = Count + 1
Next t
Summ = Count / Total
End Function

Answer 2

Sub calculatebygroups()
    last_row = Cells.SpecialCells(xlCellTypeLastCell).Row
    group_counter = 0
    value_counter = 0
    row_to_write = 0
    For n = 1 To last_row + 1
        If Range("A" & n).Value = "" Then
            If row_to_write <> 0 And value_counter <> 0 Then
                Range("C" & row_to_write).Value = "'" & value_counter & "/" & group_counter
            End If
            row_to_write = n
            group_counter = 0
            value_counter = 0
        Else
            group_counter = group_counter + 1
            If Range("B" & n).Value < 2 Then
                value_counter = value_counter + 1
            End If
        End If
    Next n
End Sub