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Transpose data in an two dimensional array

Posted on 2011-03-22
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Last Modified: 2012-08-13
I know that if you use Redim Preserve, you can only change the last dimesion of the array.
So I've now got a populated array that I want to paste into an excel sheet.  The problem is that the rows and columns are transposed.
Is there an easy way (memory and speed efficient) to transpose the array's info?
I thought the following could work, but doesn't....
      Range(Cells(20, 2), Cells(25, 3)) = Transpose(Arr)
Arr is a two dimensional array Arr(2,6) and I want it to be Arr(6,2)
Thanks
JL
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Question by:jlfourie
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Accepted Solution

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Rory Archibald earned 2000 total points
ID: 35188073
Using
Range(Cells(20, 2), Cells(25, 3)) = Application.Transpose(Arr)

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may work, but I prefer to loop and create a new array:
Function TransposeGetRows(varData) As Variant
   Dim lngRow As Long, lngCol As Long
   Dim varOut()
   ReDim varOut(1 To UBound(varData, 2) + 1, 1 To UBound(varData, 1) + 1)
   For lngRow = LBound(varData, 2) To UBound(varData, 2)
      For lngCol = LBound(varData, 1) To UBound(varData, 1)
         varOut(lngRow + 1, lngCol + 1) = varData(lngCol, lngRow)
      Next lngCol
   Next lngRow
  TransposeGetRows = varOut
End Function

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which assumes the input array is 0 based.

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Author Comment

by:jlfourie
ID: 35188167
Thanks, I just got to the same application.transpose solution and wanted to update my question.  And it works well and fast.
I might try your other option, if you think it will be much quicker (memory wise).
Regards
JL
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Author Closing Comment

by:jlfourie
ID: 35188170
Thanks for a speedy response.
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