Finding a maximum with VLOOKUP

Giganews Newsgroups
Subject: Finding a maximum with VLOOKUP
Posted by:  Russ (Russ.Dill…
Date: Thu, 16 Aug 2007

I have a set of data time/temperature data with two temperature values
specified at each time point. I am interested in finding the time
point where the difference between this two temperatures reaches a
maximum. For example:

time    T1      T2      Delta
0        175    200      25
1        150    200      50
2        100    300      200
3        175    225      50

'time', 'T1', and 'T2' are numerical values while 'Delta' is a formula
calculating the difference between 'T1' and 'T2'.

I would like to develop a lookup function to identify the value of 200
as a maximum and return the time value 2 where this maximum is

I've tried to use the MAX() as a lookup value in a VLOOKUP() function
but it doesn't seem to work.

Any ideas?

Russ D.