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Change a formula in one cell based on the value in another cell

The following formula resides in column N:
=IFERROR(LOOKUP(2,1/('M:\xxx\[XXX_2014.xlsm]Workflow'!$H$2:$H$676=M2),'M:\xxx\[XXX_2014.xlsm]Workflow'!$J$2:$J$676),"")

I need to add a second formula in column N that references a different workbook that is very similar in structure but contains different data. The formula is as follows:
=IFERROR(LOOKUP(2,1/('M:\aaa\[XXX_2014.xlsm]Workflow'!$H$2:$H$676=M2),'M:\aaa\[XXX_2014.xlsm]Workflow'!$J$2:$J$676),"")

The trigger to determine which formula to use in column N is determined by the value in column V as follows:

If column V contains the phrase "Book 3", then use the SECOND formula above.
Otherwise, if column V is blank or contains any other phrase, then use the FIRST formula above.

How do I revise the current formula to meet the new requirements?

Thanks!
Andrea
0
Andreamary
Asked:
Andreamary
2 Solutions
 
FlysterCommented:
You should be able to use a IF statement for that:

IF(V1="Book 3", IFERROR(LOOKUP(2,1/('M:\aaa\[XXX_2014.xlsm]Workflow'!$H$2:$H$676=M2),'M:\aaa\[XXX_2014.xlsm]Workflow'!$J$2:$J$676),""), IFERROR(LOOKUP(2,1/('M:\xxx\[XXX_2014.xlsm]Workflow'!$H$2:$H$676=M2),'M:\xxx\[XXX_2014.xlsm]Workflow'!$J$2:$J$676),""))

Open in new window

Just change V1 to the row you need to refer to.

Flyster
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Saqib Husain, SyedEngineerCommented:
Can be further reduced to

=IFERROR(LOOKUP(2,1/if(v2="Book 3",('M:\aaa\[XXX_2014.xlsm]Workflow'!$H$2:$H$676=M2),'M:\aaa\[XXX_2014.xlsm]Workflow'!$J$2:$J$676),('M:\xxx\[XXX_2014.xlsm]Workflow'!$H$2:$H$676=M2),'M:\xxx\[XXX_2014.xlsm]Workflow'!$J$2:$J$676)),"")
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Rob HensonIT & Database AssistantCommented:
Will both source books be open at the same time as the destination book?

If so, you could use INDIRECT and pull together the file path string using IF statements creating a different string for the two different files depending on the criteria specified.

If the source books will be closed, this won't work because INDIRECT doesn't work on closed books.

Thanks
Rob H
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AndreamaryAuthor Commented:
The source books will not always be open, but thanks for the suggestion.

I'm just implementing the formulas proposed above and should have feedback soon.

Andrea
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AndreamaryAuthor Commented:
Thanks for the prompt responses and excellent solutions!
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