How to “flatten” or “collapse” a 2D Excel table into 1D?

Question

I have a two dimensional table with countries and years in Excel. eg.

        1961        1962        1963        1964
USA      a           x            g           


        

Answer 1

I developed another macro because I needed to refresh the output table quite often (input table was filled by other) and I wanted to have more info in my output table (more copied column and some formulas)

Sub TableConvert()

Dim tbl As ListObject 
Dim t
Rows As Long
Dim tCols As Long
Dim userCalculateSetting As XlCalculation
Dim wrksht_in As Worksheet
Dim wrksht_out As Worksheet

'##block calculate and screen refresh
Application.ScreenUpdating = False
userCalculateSetting = Application.Calculation
Application.Calculation = xlCalculationManual

'## get the input and output worksheet
Set wrksht_in = ActiveWorkbook.Worksheets("ressource_entry")'## input
Set wrksht_out = ActiveWorkbook.Worksheets("data")'## output.


'## get the table object from the worksheet
Set tbl = wrksht_in.ListObjects("Table14")  '## input
Set tb2 = wrksht_out.ListObjects("Table2") '## output.

'## delete output table data
If Not tb2.DataBodyRange Is Nothing Then
    tb2.DataBodyRange.Delete
End If

'## count the row and col of input table

With tbl.DataBodyRange
     tRows = .Rows.Count
     tCols = .Columns.Count
End With

'## check every case of the input table (only the data part)
For j = 2 To tRows '## parse all row from row 2 (header are not checked)
    For i = 5 To tCols '## parse all column from col 5 (first col will be copied in each record)
        If IsEmpty(tbl.Range.Cells(j, i).Value) = False Then
            '## if there is time enetered create a new row in table2 by using the first colmn of the selected cell row and cell header plus some formula
            Set oNewRow = tb2.ListRows.Add(AlwaysInsert:=True)
            oNewRow.Range.Cells(1, 1).Value = tbl.Range.Cells(j, 1).Value
            oNewRow.Range.Cells(1, 2).Value = tbl.Range.Cells(j, 2).Value
            oNewRow.Range.Cells(1, 3).Value = tbl.Range.Cells(j, 3).Value
            oNewRow.Range.Cells(1, 4).Value = tbl.Range.Cells(1, i).Value
            oNewRow.Range.Cells(1, 5).Value = tbl.Range.Cells(j, i).Value
            oNewRow.Range.Cells(1, 6).Formula = "=WEEKNUM([@Date])"
            oNewRow.Range.Cells(1, 7).Formula = "=YEAR([@Date])"
            oNewRow.Range.Cells(1, 8).Formula = "=MONTH([@Date])"
        End If
   Next i
Next j
ThisWorkbook.RefreshAll

'##unblock calculate and screen refresh
Application.ScreenUpdating = True 
Application.Calculate
Application.Calculation = userCalculateSetting

End Sub