by Allen Wyatt
(last updated June 17, 2017)
Dimitris has a series of integer values in column A. He would like a way to show the odd values in column B and the even values in column C. He wants the values to be in contiguous cells, with no spaces, and to also be in ascending order. Dimitris wonders if he would need a macro to process his data in this way.
The short answer is that you can, indeed, do this without resorting to a macro. However, if you need to perform this type of processing a lot, you may find it more beneficial to actually use a macro.
First, let's look at the non-macro approaches. You could, if desired, write simple formulas in columns B and C that simply check if the value in column A is odd or even and, if it is appropriate to the column, copy the value over. For instance, you could have the following in column B:
In column C, all you would need to do is replace ISODD with ISEVEN. When you copy these formulas down, then colum B contains only odd values and column C contains only even values. The problem, of course, is that the result doesn't match what Dimitris is looking for: He wants the values in contiguous cells (no blanks) and he wants them in ascending order.
Granted, you can take additional steps to get the desired results—for instance, you could copy the results in columns B and C and paste back values (so the formulas are removed) and then sort the results. This adds additional steps to your work.
There is a way to get a much "cleaner" result by simply using an array formula. Let's assume you're your values are in cells A1:A100. With cells B1:B100 selected, enter the following in the Formula Bar:
=IFERROR(SMALL(IFERROR(INDEX($A$1:$A$100,SMALL( IF(MOD($A$1:$A$100,2)=1,ROW($A$1:$A$100)),ROW( $A1:$A$100))),""),ROW()),"")
Remember that this is all a single formula. Since it is designed to be an array formula, terminate it by entereing Ctrl+Shift+Enter. The result is that you have the odd values in column B, in contiguous cells, in ascending order. To get the even values into column C, first copy B1:B100 to C1:C100. Then, select the range C1:C100. Press F2 to enter edit mode and change the "=1" in the middle of the formula to "=0". Again, terminate the formula by pressing Ctrl+Shift+Enter.
You should note that this formula won't work properly if there are any blanks in the A1:A100 range or if there are any text values in the range. The reason that blanks won't work is because they are treated as a 0 formulaicly, and a 0 is considered even, thus showing up in column C. An alternative formula to determine odd values (column B) is to use the following array formula in cell B1:
To deal with the potential "blank cell" issue, you could then use the following array formula in cell C1:
Copy B1:C1 down as many cells as necessary to get your results.
Earlier I mentioned that you may find it more beneficial to use a macro to process your values. The reason is simple—you can easily get rid of duplicate values (if you need to) and you can ignore blanks and text values. There are any number of ways that such a macro could be developed; I chose an approach that requires you to select which cells you want to process, clears the two columns to the right of those cells, and then puts odds and evens in those columns.
Sub OddsEvens() Dim rSource As Range Dim c As Range Dim sTemp As String Dim iVal As Integer Dim bGo As Boolean Dim sCols As String Dim vMsg As Variant Dim lOddCol As Long Dim iOddPtr As Integer Dim lEvenCol As Long Dim iEvenPtr As Integer Dim iOdds(999) As Integer Dim iEvens(999) As Integer Dim J As Integer Set rSource = Selection If rSource.Columns.Count = 1 Then lOddCol = rSource.Column + 1 lEvenCol = rSource.Column + 2 sCols = Chr(lOddCol + 64) & ":" sCols = sCols & Chr(lEvenCol + 64) sTemp = "The contents of columns " & sCols sTemp = sTemp & " will be deleted. Ok to proceed?" vMsg = MsgBox(sTemp, vbYesNo, "Odds and Evens") If vMsg = vbYes Then Application.ScreenUpdating = False Range(sCols).Clear iOddPtr = 0 iEvenPtr = 0 For Each c In rSource bGo = True ' Is the cell empty? If IsEmpty(c.Value) Then bGo = False ' Does the cell contain non-numeric value? If Not IsNumeric(c.Value) Then bGo = False If bGo Then iVal = c.Value If Int(iVal / 2) * 2 = iVal Then ' Even number ' Check to see if duplicate For J = 1 To iEvenPtr If iEvens(J) = iVal Then bGo = False Next J If bGo Then iEvenPtr = iEvenPtr + 1 iEvens(iEvenPtr) = iVal End If Else 'Odd number ' Check to see if duplicate For J = 1 To iOddPtr If iOdds(J) = iVal Then bGo = False Next J If bGo Then iOddPtr = iOddPtr + 1 iOdds(iOddPtr) = iVal End If End If End If Next c ' Stuff values into proper columns For J = 1 To iOddPtr Cells(rSource.Row + J - 1, lOddCol) = iOdds(J) Next J For J = 1 To iEvenPtr Cells(rSource.Row + J - 1, lEvenCol) = iEvens(J) Next J ' Sort values in Odd column sTemp = Chr(lOddCol + 64) & rSource.Row & ":" sTemp = sTemp & Chr(lOddCol + 64) & rSource.Row _ + iOddPtr - 1 Range(sTemp).Select Selection.Sort key1:=Range(Chr(lOddCol + 64) _ & rSource.Row), Order1:=xlAscending ' Sort values in Even column sTemp = Chr(lEvenCol + 64) & rSource.Row & ":" sTemp = sTemp & Chr(lEvenCol + 64) & rSource.Row _ + iEvenPtr - 1 Range(sTemp).Select Selection.Sort key1:=Range(Chr(lEvenCol + 64) _ & rSource.Row), Order1:=xlAscending rSource.Select Application.ScreenUpdating = True End If End If End Sub
The macro does its work by stuffing values from the selected cells into either of two arrays (iEvens and iOdds). This is done so that the macro can easily check for duplicates in the values. Only if the cell is not empty, it contains a number, and that number is not a duplicate will the value be added to the appropriate array. The values are then stuffed back into the two columns and those values are sorted.
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