is there an alternative to VLOOKUP which interpolates

benwallace100

New Member
Joined
Jan 22, 2008
Messages
8
Hi All

I am using Vlookup formula, but the second column of data (the data which vlookup returns) is very noisy, and instead of choosing the nearest datapoint I would rather do a linear interpolation between the nearest 2 datapoints...

What is the easiest way to do this?

Many thanks in advance.
 

Phox

Well-known Member
Joined
Jul 26, 2004
Messages
522
See if this formula is to your liking. LRANGE is defined as the lookup column, DRANGE is the data column, and VALUE is the lookup value.
Code:
=(INDEX(DRANGE,MATCH(VLOOKUP(VALUE,LRANGE:DRANGE,2),DRANGE)+1)+VLOOKUP(VALUE,LRANGE:DRANGE,2))/2
 

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