Passing a range to Excel User Defined Function and assigning it to an array

Question

I'm trying to

• pass two ranges - several rows of one column - to a user-defined function in Excel 2007,
• then assign it to the array for processing.

Can someone tell me how to assign such a range to an array?

The range is not constant, since I use UDF in different cells for different data, so I can not use e, g, Range("A1:A10")

The code works when I just use Data1.Rows.Cells(i, 1) instead of arrays. But I think it's better to use one-dimensional arrays to increase efficiency.

Here is my current code

 Function Sample(Data1 As Range, Data2 As Range) As Double 'Size of Data1 and Data2 Dim rows As Integer rows = Data1.Rows.Count 'Declaring two one dimensional arrays Dim data1Array(rows) As Double --- Getting error here Dim data2Array(rows) As Double --- Getting error here Dim diff As Double Dim average As Double Dim i As Integer 'Assigning Range to Array data1Array = Data1 --- Getting Error here data2Array = Data2 --- Getting Error here average = 0 diff = 0 For i = 1 To rows diff = data1Array(i) - data2Array(i) If diff < 0 Then diff = diff * -1 End If average = diff + average Next i Sample = average/rows End Function 

Answer 1

Something like this for working with 1D ranges that include testing for

• unequal ranges
• ranges of single cells (cannot use options)

example

 Sub Test() MsgBox Sample([a1:a3], [a5:a7]) End Sub 

function

  Function Sample(Data1 As Range, Data2 As Range) Dim X Dim Y Dim lngCnt As Long Dim dbDiff As Double Dim dbAvg As Double If Data1.rows.Count <> Data2.rows.Count Then Sample = "Different range sizes" Exit Function ElseIf Data1.rows.Count = 1 Then Sample = "Single cell range" Exit Function End If X = Application.Transpose(Data1) Y = Application.Transpose(Data2) For lngCnt = 1 To UBound(X) dbDiff = X(lngCnt) - Y(lngCnt) If dbDiff < 0 Then dbDiff = dbDiff * -1 End If dbAvg = dbDiff + dbAvg Next Sample = dbAvg / lngCnt End Function