Home » excel » excel – Speeding up calculations on a table

# excel – Speeding up calculations on a table

Posted by: admin May 14, 2020 Leave a comment

Questions:

I’ve got a table that will have different formulas for odd and even columns. I’m trying to loop through the table to do these calculations, but the problem is that it’s taking forever, even when my code doesn’t perform a calculation. Does anyone have suggestions on how I could improve my code? Here’s what I’ve got so far:

``````Dim tbl As ListObject
Dim tRows As Long
Dim tCols As Long
Dim i As Long
Dim i2 As Long
Dim even As Boolean

Set tbl = ActiveSheet.ListObjects("Table1")

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

'Start performing calculations
For i = 2 To tCols

If i Mod 2 = 0 Then
even = True
Else
even = False
End If

For i2 = 2 To tRows + 1
If even Then
'Formula for even columns
Cells(i2, i) = "Even"
Else
'Formula for odd columns
Cells(i2, i) = "Odd"
End If
Next i2

Next i
``````
How to&Answers:

Imagine the following data:

Then run the following code:

``````Sub Test()

Dim tbl As ListObject: Set tbl = Sheet1.ListObjects("Table1")
tbl.DataBodyRange.FormulaR1C1 = "=IF(ISODD(COLUMN()),TRUE,FALSE)"

End Sub
``````

With the following result:

Note that:

• You must replace the `TRUE` part of my formula with your `ODD` formula.
• You must replace the `FALSE` part of my formula with your `EVEN` formula.
• I have used a explicit cell reference to `Sheet1` using it’s `CodeName`. So change that accordingly

Regardless of amount of columns or rows, the whole `.DataBodyRange` has been filled according to the formula.