author,
microsoft office 2010 serial key sale, Dany Hoter, a Solution Planner around the Excel crew, talks about some performance attributes he just lately identified utilising various systems to manipulate considerable ranges by using VBA. description
possess a significant range in Excel with info. Let us say it consists of one hundred,000 rows and 50 columns for every row (Sure you might be utilizing Excel 2007 needless to say). So entirely you have five,000,000 cells. Columns A to F have some alphanumeric info that you simply require review and based upon the blend of values for every row you must utilize the numeric values in G to H to do some calculations and save the results in columns I and J. You might put 200,
microsoft office pro plus 32 bit key,000 formulas in I and J however you see that a spreadsheet with this kind of a volume of formulas will get extremely sow and consumes massive quantities of memory. to try to fix it in a very piece of VBA code. The query is the right way to apply these kinds of a job while in the most efficient way? What exactly are your methods
could you scan a selection in Excel, read through the values in some cells, and alter some some others? Use a array object
suppose the vary you'd like to study starts at A1 appears anything like this: as Assortment ' Could also be Dim DataRange as Object
Dim Irow as Prolonged
Dim MaxRows as Extended
Dim Icol as Integer
Dim MaxCols as Lengthy
Dim MyVar as Double
Set DataRange=Range("A1").CurrentRegion
MaxRows= Collection("A1").CurrentRegion.Rows.Count
MaxCols= Variety("A1").CurrentRegion.Columns.Count
For Irow=1 to MaxRows
For icol=1 to MaxCols
MyVar=DataRange(Irow,
genuine microsoft windows 7 x64 key,Icol)
If MyVar > 0 then
MyVar=MyVar*Myvar ' Transform the value
DataRange(Irow,Icol)=MyVar
End If
Next Icol
Next Irow selection and move it by using offset
VBA developers learned VBA techniques from macro recording. relative reference the generated VBA code creates statements like: a consequence many developers adopt this technique and utilize the ActiveCell or selection ranges to move from cell to cell in code and go through or write the cell values. The code will look similar to this: As Prolonged
Dim MaxRows As Long
Dim Icol As Integer
Dim MaxCols As Long
Dim MyVar As Double
Range("A1").Select
MaxRows = Variety("A1").CurrentRegion.Rows.Count
MaxCols = Variety("A1").CurrentRegion.Columns.Count
For Irow = one To MaxRows
For Icol = 1 To MaxCols
MyVar = ActiveCell.Value
If MyVar > 0 Then
MyVar=MyVar*Myvar ' Alter the value
ActiveCell.Value = MyVar
End If
ActiveCell.Offset(0,
microsoft office Pro Plus 2007 serial, one).Select ' Move one column to the right
Next Icol
ActiveCell.Offset(1, -MaxCols).Select ' Move one rows down and back to first column
Next Irow variant type variable
technique copies the values from all cells while in the vary into a variable in memory, manipulates the values inside this variable and if needed moves the values back to the assortment after manipulation. the code this time: As Variant
Dim Irow As Very long
Dim MaxRows As Lengthy
Dim Icol As Integer
Dim MaxCols As Lengthy
Dim MyVar As Double
DataRange = Selection("A1").CurrentRegion.Value ' Not utilizing set
MaxRows = Assortment("A1").CurrentRegion.Rows.Count
MaxCols = Collection("A1").CurrentRegion.Columns.Count
For Irow = 1 To MaxRows
For Icol = one To MaxCols
MyVar = DataRange(Irow,
microsoft office Professional Plus 2010 64 bit, Icol)
If MyVar > 0 Then
MyVar=MyVar*Myvar ' Alter the value
DataRange(Irow, Icol) = MyVar
End If
Next Icol
Next Irow
Range("A1").CurrentRegion = DataRange ' writes back the result to the array is that this method is blazing fast compared to the two other folks. Overall performance Summary
compared the three strategies on relatively huge ranges and here are the results:
you can see working with a variant variable is much faster especially when changing cells. Even if the calculation can be done with Excel formulas, in some cases this method is the only one acceptable because implementing a very considerable number of formulas can become rather slow. one method to avoid is moving the ActiveCell employing Offset.