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Volatile INDIRECT

  1. 04-22-2010, 11:37 AM #1
    wjsok85
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    Volatile INDIRECT

    Hi,

    I have a workbook that has a 'front sheet' that pulls information from each of the 150+ worksheets, this uses multiple formulas - totaling about 6400 of these formulas.

    Example - =IF(INDIRECT("'"&A91&"'!$C$18")<>"",10,"")

    The reason for INDIRECT is that the cells A4:A150 contain an Index of the worksheets, which can constantly change...

    My workbook has reached 98MB and I am struggling to find a way to streamline the process by which I pull back information to the front sheet.

    Does anyone have any suggestions to a alternative for INDIRECT, or even a completely different approach?

    (My problem is that the workbook tracks 'training' for a whole department (which is growing) and I know the workbook at such a large size already is only going to get slower and slower!)

    Thanks in advance!
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  2. 04-22-2010, 11:43 AM #2
    shg
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    Re: Volatile INDIRECT

    Someone here could tell you if MoreFunc's INDIRECT.EXT is non-volatile.
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  3. 04-22-2010, 11:44 AM #3
    wjsok85
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    Re: Volatile INDIRECT

    True - but are there not issues embedding some of the morefunc functions into Excel 2007?
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  4. 04-22-2010, 11:46 AM #4
    shg
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    Re: Volatile INDIRECT

    Dunno, sorry, I don't use it.
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  5. 04-22-2010, 11:48 AM #5
    NBVC
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    Re: Volatile INDIRECT

    There is an option argument in INDIRECT.EXT to choose volatility:

    =INDIRECT.EXT(Reference,Volatile,A1-Style,Mode)

    http://xcell05.free.fr/morefunc/engl...direct.ext.htm

    I think the the embedding of the addin does not work in 2007... so you can't share the workbook without having user install Morefunc too.
    Where there is a will there are many ways.

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  6. 04-22-2010, 11:53 AM #6
    DonkeyOte
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    Re: Volatile INDIRECT

    You could use VBA to rebuild the formulae as and when the sheet name is altered in Column A.

    IMO you either need "hardwired" links or else you need Volatility given the otherwise implicit references.
    My Recommended Reading:

    Volatility
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  7. 04-22-2010, 12:00 PM #7
    DonkeyOte
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    Re: Volatile INDIRECT

    As a final (possible) pointer...

    Pending layout... if we assumed that on your summary sheet the formulae are listed adjacent to the sheet names and that presumably the formulae are identical per column then in theory...

    Use row 3 to store each formula as a string with a "place holder" (ie some denotation) for sheet name ... this string could be applied to whichever row has had a sheet name change with the place holder substituted for the appropriate sheet name.

    Such an approach would remove the volatility but would adapt as sheet names were altered ... (you've not as yet specified how A4:A150 is generated - manual or other means)
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  8. 04-22-2010, 12:01 PM #8
    shg
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    Re: Volatile INDIRECT

    Embedding aside, if you used INDIRECT.EXT in non-volatile fashion, you could force a full recalc wihen the master sheet was selected, if the linked sheets don't change while you're not looking.
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  9. 04-22-2010, 12:03 PM #9
    wjsok85
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    Re: Volatile INDIRECT

    Donkey...

    Im not sure what you mean when reffering to string as formula and place holder?

    The Sheetnames are generated via VB acting as both an Index and a hyperlink to each sheet
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  10. 04-22-2010, 12:14 PM #10
    DonkeyOte
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    Re: Volatile INDIRECT

    What I mean is say B4:B150 all presently use: 

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    then in theory you could store the "master formula" in B3 which is in effect:

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    where PLACEHOLDER represents the sheet variable (to be determined)

    Then when the sheet names are altered you revise the formula accordingly, ie:

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    does that make sense ? very basic example of course.

    (edit on an aside the use of quotations to encase the formula is not really advisable ... better perhaps to encase the master within an unusual char (ie something not used in your formulae) - eg: #='PLACEHOLDER'!C12# and amend VBA accordingly to split based on "#")
    Last edited by DonkeyOte; 04-22-2010 at 12:32 PM.
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  11. 07-23-2010, 07:53 AM #11
    wjsok85
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    Re: Volatile INDIRECT

    Sorry for late reply, finally solved the size issue by finding that I had sloppy code that was copying an Indirect formula down ALL rows - oh dear.

    Tided up and much better!

    Thanks for all help received
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