how to transform three columns to a matrix using macro - excel

Question

I need some help converting three colums into a matrix using excel macro.
Here is an example:
From this:
A A 0
A B 23
A C 3
B A 7
B B 56
B C 33
C A 31
C B 6
C C 5
to this:
A B C
A 0 23 3
B 7 56 33
C 31 6 5
Hope you can help me.
Thanks

Answer 1

Not quite sure what exactly you are meaning by matrix. For the code below I assumed you were looking for a way to read the data in the first two columns as Row and Column data of the output table. Assume the input data is in the Columns 1 - 3 of "Sheet1"
Sub ConvertTableOfData()
Dim testArray(1 to 3)
Dim chkROW as Integer
Dim chkCOL as Integer
Dim chkVAL as Integer
'// index the Row and Column headers
testArray(1) = "A"
testArray(2) = "B"
testArray(3) = "C"
'// Iterate through every row in the initial dataset
For i = 1 to Worksheets("Sheet1").Cells(1, 1).End(xlDown).Row
With Worksheets("Sheet1")
'// Assign the Output Row and Column values
'// based on the array indices
For j = 1 to UBound(testArray, 1)
If .Cells(i, 1) = testArray(j) Then
chkROW = j
End If
If .Cells(i, 2) = testArray(j) Then
chkCOL = j
End If
Next j
'// store the actual value
chkVAL = .Cells(i, 3)
End With
'// output table (in Sheet2)
With Worksheets("Sheet2")
.Cells(chkROW, chkCOL) = chkVAL
End With
Next i
'// Add headers to Output table
For i = 1 to 3
With Worksheets("Sheet2")
.Cells(i + 1, 1) = testArray(i)
.Cells(i, i + 1) = testArray(i)
End With
Next i
End Sub

Answer 2

You can also perform this without VBA.
Assume your table of data is in the range A1:C9.
Assume the first number (0) in the 3 by 3 grid of data is cell F3, with A, B, C in the row above, and A, B, C in the column to the left.
Enter the formula in cell F3 as
=INDEX($C$1:$C$9,SUMPRODUCT(--($A$1:$A$9=$E3),--($B$1:$B$9=F$2),ROW($A$1:$A$9)))
Copy this formula to all 9 cells in the 3 by 3 grid.
This generalized to any size of data.