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How to split data in excel into equal groups? (excel vba)

Posted on 2016-10-28
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Last Modified: 2016-11-22
Hi everyone,

I have a big amount of data in excel (many rows, many columns) and I need to devide it into equal groups. The main problem is that the amount of groups is something that I cannot predict, meaning that on day I need to split it into 12 groups other day into 15. Additionally, the amount of columns and rows also may change, depends on the kind of report we receive. What I need is macro(?) which will allow me to to devide data into separate tabs, but the amount of the tabs is something I need to choose. All data provided in the report need to move.

Is anyone able to help me?

Thank you in advance.
Report.xlsx
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Question by:Marta Wilczyńska
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Expert Comment

by:Martin Liss
ID: 41864083
Can you give an example of, or tell us how you want it divided up?
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LVL 93

Accepted Solution

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Patrick Matthews earned 2000 total points (awarded by participants)
ID: 41864391
This appears to do it.  Assumptions:
  • Prompted for number tabs to split to at start
  • If # of data rows is evenly divisible by # tabs, each tab will have same # rows
  • If not, The first (n-1) tabs will have the same # rows, and the "extra" rows go to the nth tab

Option Explicit

Sub SplitToTabs()
    
    Dim LastR As Long, LastC As Long
    Dim SourceWs As Worksheet
    Dim DestWb As Workbook
    Dim DestWs As Worksheet
    Dim NumOfTabs As Long
    Dim NumDataRows As Long
    Dim RowsPerTab As Long
    Dim OldSheetsPerWb As Long
    Dim Counter As Long
    Dim RowsToCopy As Long
    Dim StartCopyRow As Long
    
    Set SourceWs = ActiveSheet
    With SourceWs
        LastR = .Cells(.Rows.Count, 1).End(xlUp).Row
        LastC = .Cells(1, .Columns.Count).End(xlToLeft).Column
    End With
    NumDataRows = LastR - 1
    
    NumOfTabs = InputBox("You have " & NumDataRows & " data rows", "How many tabs to split into?", 1)
    RowsPerTab = Int(NumDataRows / NumOfTabs)
    
    OldSheetsPerWb = Application.SheetsInNewWorkbook
    Application.SheetsInNewWorkbook = NumOfTabs
    Set DestWb = Workbooks.Add
    Application.SheetsInNewWorkbook = OldSheetsPerWb
    StartCopyRow = 2
    
    For Counter = 1 To NumOfTabs
        Set DestWs = DestWb.Worksheets(Counter)
        SourceWs.Cells(1, 1).Resize(1, LastC).Copy DestWs.Cells(1, 1)
        If Counter < NumOfTabs Then
            RowsToCopy = RowsPerTab
        Else
            RowsToCopy = LastR - StartCopyRow + 1
        End If
        SourceWs.Cells(StartCopyRow, 1).Resize(RowsToCopy, LastC).Copy DestWs.Cells(2, 1)
        StartCopyRow = StartCopyRow + RowsToCopy
    Next
    
End Sub

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Author Comment

by:Marta Wilczyńska
ID: 41871700
Patrick it works! Thank you very much
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LVL 93

Expert Comment

by:Patrick Matthews
ID: 41897212
author acknowledged answer
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