vba arrays

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VBA Arrays

resolvedResolved · Urgent Priority · Version 2007

Victor has attended:
Excel VBA Intro Intermediate course

VBA Arrays

Can you upload a group of worksheets (formulae and all) to an array e.g. having an array of 6 worksheets?

Thanks

RE: VBA Arrays

Hi Victor, thanks for your query. You can indeed upload worksheets into an array, like so:

Dim myarray(1 To 6) As Variant

Set myarray(1) = Sheets("January")
Set myarray(2) = Sheets("February")

...and so on.

Hope this helps,

Anthony

RE: VBA Arrays

Thanks Anthony,

A couple of follow up questions - will this preserve the formulae in the sheets?

e.g. if sheet X were in an array and cell A1=A2+A3, and the macro were to change the value of A2 in sheet X the array, would A1 also update?

How do I refer to cell A3 for example, in the array sheet, is it akin to using a named sheet e.g. NameOfSheetInArray.Range...

Hope that's a clear question! Victor

RE: VBA Arrays

Hi Victor, thanks for your query. The answer is yes. Here's an illustration. Create a worksheet "MySheet", A1=1, A2=2, A2=3, sum those values in a4 then run the following subroutine:

Sub test()

Dim myarray(1) As Worksheet

Dim sheetobj As Worksheet

Set myarray(1) = Sheets("MySheet")

MsgBox myarray(1).Cells(4, 1) 'returns 6 from the array
myarray(1).Cells(1, 1) = 5 'writes a new value to the array, and to the sheet

End Sub

Hope this helps,

Anthony

RE: VBA Arrays

Hi Anthony,

Thanks for the above. A follow on question:

I have written some code based on the above and some other pointers I've found online:

/***

sub NewArrayTest()

Dim Worksheet As Variant
Dim wCohortEngine() As Worksheet
Dim wCohortResults(0) As Worksheet

Dim intTestArrayNumber As Integer
intTestArrayNumber = shtcohortresults.Range("H7").Value - shtcohortresults.Range("H6").Value

Dim intCurrentAge As Integer
intCurrentAge = 0

Set wCohortResults(0) = shtcohortresults

ReDim wCohortEngine(intTestArrayNumber)

For Each Worksheet In wCohortEngine

Set wCohortEngine(intCurrentAge) = shtcohortmodel

wCohortEngine(intCurrentAge).Range("c125").Value = 1 + intCurrentAge
'Debug.Print wCohortEngine.Range("c125").Value

wCohortResults(0).Range("d33:d40").Offset(0, intCurrentAge).Value = _
wCohortEngine(intCurrentAge).Range("d327:d334").Value

wCohortResults(0).Range("d49:d56").Offset(0, intCurrentAge).Value = _
wCohortEngine(intCurrentAge).Range("d335:d342").Value

'Debug.Print wCohortEngine.Range("d335").Value
'Debug.Print shtcohortresults.Range("d49").Value

intCurrentAge = intCurrentAge + 1

Next Worksheet

End Sub

**/

Currently, with testarraynumber=100 it takes approximately 15s to complete. I need to make this quicker as the next step for the analysis is to perform a monte carlo simulation based on the aggregated result of the code above.

My guess is that getting the worksheets in the array to update simultaneously instead of within a loop would be the quickest but I have no clue how to do this!

Anything you can suggest that may help would be awesome.

Thanks - Victor

Tue 4 Oct 2011: Automatically marked as resolved.

 

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