Solved

ISNA(Index

Posted on 2011-09-15
2
217 Views
Last Modified: 2012-06-27
Experts,
I have run across a spreadsheet that uses the Isna(Index function. I'm not familiar with this function and was wondering if a vlookup could be used in place of? Here's an example:

=IF(ISNA(INDEX('C:\Users\ffreese\AppData\Local\Microsoft\Windows\Temporary Internet Files\OLK1FC4\[Summary.xls]MS AUG'!$A$1:$G$1000,MATCH($A5,'C:\Users\ffreese\AppData\Local\Microsoft\Windows\Temporary Internet Files\OLK1FC4\[Summary.xls]MS AUG'!$A$1:$A$1000,),MATCH($A$1,'C:\Users\ffreese\AppData\Local\Microsoft\Windows\Temporary Internet Files\OLK1FC4\[Summary.xls]MS AUG'!$A$1:$G$1,))),0,INDEX('C:\Users\ffreese\AppData\Local\Microsoft\Windows\Temporary Internet Files\OLK1FC4\[Summary.xls]MS AUG'!$A$1:$G$1000,MATCH($A5,'C:\Users\ffreese\AppData\Local\Microsoft\Windows\Temporary Internet Files\OLK1FC4\[Summary.xls]MS AUG'!$A$1:$A$1000,),MATCH($A$1,'C:\Users\ffreese\AppData\Local\Microsoft\Windows\Temporary Internet Files\OLK1FC4\[Summary.xls]MS AUG'!$A$1:$G$1,))*-1)+'#21TL'!L5

This just looks like too much work
0
Comment
Question by:Frank Freese
2 Comments
 
LVL 33

Accepted Solution

by:
Rob Henson earned 500 total points
ID: 36544295
The majority of the text in that formula is the file path for a linked file.

The other reason for the lengthy text is becuase of the lack of a better error evaluation formula in xl2003.

The formula is saying IF the results of the formula give an NA error then zero else do the formula.

xl2007 has got round this with the IFERROR function, you only need to specify the formula once and the value if an error.

I have just had a similar question answered that was in fact the other way round. I had literally tens of thousands of vlookup formulae in a workbook creating a cost model for an 18 month weekly forecast. The filesize is 16Mb and it was taking at least 1 minute to recalculate.

I have now changed the lookups for INDEX using MATCH to identify the row and the calculation time isn't even noticeable.

INDEX does basically the same as a lookup:

=INDEX(Array,Row,Column)

Array - block of data same as would use for lookup
Row - the row within the array that the data to be found is on
Column - Offset like lookup

I have replaced the Row with a MATCH formula to identify the row number from the column which would normally have been used for a lookup and then column is variable.

HTH
Rob H
0
 

Author Closing Comment

by:Frank Freese
ID: 36544328
thanks
0

Featured Post

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction This Article briefly covers methods of calculating the NPV and IRR variants in Excel as well as the limitations in calculating and interpreting IRR results. Paraphrasing Richard Shockley, author of my favourite finance reference tex…
This article descibes how to create a connection between Excel and SAP and how to move data from Excel to SAP or the other way around.
The viewer will learn how to use a discrete random variable to simulate the return on an investment over a period of years, create a Monte Carlo simulation using the discrete random variable, and create a graph to represent the possible returns over…
This Micro Tutorial demonstrates how to create Excel charts: column, area, line, bar, and scatter charts. Formatting tips are provided as well.

733 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question