Excel VBA - 确定数组 UDF 的列或行目标
Posted
技术标签:
【中文标题】Excel VBA - 确定数组 UDF 的列或行目标【英文标题】:Excel VBA - Determining Column or Row Target of Array UDF 【发布时间】:2017-12-08 14:27:25 【问题描述】:我有一个简单的 Excel UDF,用于将质量值数组转换为摩尔分数。大多数情况下,输出将是一个列数组(n 行 x 1 列)。
如何在 VBA 环境中确定工作表上目标单元格的尺寸,以确保它应该以 n 行 1 列而不是 n 列 1 行的形式返回?
Function molPct(chemsAndMassPctsRng As Range)
Dim chemsRng As Range
Dim massPctsRng As Range
Dim molarMasses()
Dim molPcts()
Set chemsRng = chemsAndMassPctsRng.Columns(1)
Set massPctsRng = chemsAndMassPctsRng.Columns(2)
chems = oneDimArrayZeroBasedFromRange(chemsRng)
massPcts = oneDimArrayZeroBasedFromRange(massPctsRng)
'oneDimArrayZeroBasedFromRange is a UDF to return a zero-based array from a range.
ReDim molarMasses(UBound(chems))
ReDim molPcts(UBound(chems))
totMolarMass = 0
For chemNo = LBound(chems) To UBound(chems)
molarMasses(chemNo) = massPcts(chemNo) / mw(chems(chemNo))
totMolarMass = totMolarMass + molarMasses(chemNo)
Next chemNo
For chemNo = LBound(chems) To UBound(chems)
molPcts(chemNo) = Round(molarMasses(chemNo) / totMolarMass, 2)
Next chemNo
molPct = Application.WorksheetFunction.Transpose(molPcts)
End Function
我知道,如果没有别的,我可以有一个输入参数来标记是否返回应该是一个行数组。我希望不要走那条路。
【问题讨论】:
在 UDF 中Application.ThisCell
为您提供包含公式的范围。很确定这也适用于数组公式。 Application.Caller
类似。您应该能够使用其中之一来确定您的输出数组的尺寸。 cpearson.com/excel/returningarraysfromvba.aspx
【参考方案1】:
这是UDF()
的一个小例子:
-
接受可变数量的输入范围
提取这些范围内的唯一值
创建合适的输出数组(列、行或块)
将唯一值转储到该区域
Public Function ExtractUniques(ParamArray Rng()) As Variant
Dim i As Long, r As Range, c As Collection, OutPut
Dim rr As Range, k As Long, j As Long
Set c = New Collection
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'
' First grab all the data and make a Collection of uniques
'
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
On Error Resume Next
For i = LBound(Rng) To UBound(Rng)
Set r = Rng(i)
For Each rr In r
c.Add rr.Value, CStr(rr.Value)
Next rr
Next i
On Error GoTo 0
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'
' next create an output array the same size and shape
' as the worksheet output area
'
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
k = 1
With Application.Caller
ReDim OutPut(1 To .Rows.Count, 1 To .Columns.Count)
End With
For i = LBound(OutPut, 1) To UBound(OutPut, 1)
For j = LBound(OutPut, 2) To UBound(OutPut, 2)
If k < c.Count + 1 Then
OutPut(i, j) = c.Item(k)
k = k + 1
Else
OutPut(i, j) = ""
End If
Next j
Next i
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
'
' put the data on the sheet
'
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
ExtractUniques = OutPut
End Function
【讨论】:
谢谢! Application.Caller 应该可以工作。另外,我需要了解更多关于集合的信息。它们似乎比数组灵活得多。 @MichaelJames 让数组和集合一起工作很容易.....【参考方案2】:您应该返回二维数组:行向量为 n × 1,列向量为 1 × n。
所以你需要一个
Redim molPcts(1, Ubound(chems) + 1)
或
Redim molPcts(Ubound(chems) + 1, 1)
要引用它们,您需要使用两个索引:
molPcts(1, chemNo + 1)
或
molPcts(chemNo + 1, 1)
如果你更喜欢从 0 开始的数组,redim 应该是这样的:
Redim molPcts(0 To 0, 0 To Ubound(chems))
Redim molPcts(0 To Ubound(chems), 0 To 0)
【讨论】:
谢谢。如果我使用二维数组,我如何在 VBA 中确定它们是否需要以 1 x n 或 n x 1 的形式表示?这是否取决于 excel 工作表上目标单元格的尺寸?如果是这样,有没有办法从 VBA 环境中检测目标单元格的尺寸?以上是关于Excel VBA - 确定数组 UDF 的列或行目标的主要内容,如果未能解决你的问题,请参考以下文章