Re: [libreoffice-users] CORRECTED SOLUTION selecting cells in calc sheet

For anyone who might have taken an interest in this discussion, I omitted a right parenthesis when 
I first posted this formula. It is now correct.

-- 
Jim

-----Original Message-----
From: James E Lang <jim+lou@lang.hm>
To: users@global.libreoffice.org, pete nikolic <pg.nikolic1@gmail.com>
Sent: Sat, 25 Apr 2015 11:47
Subject: Re: [libreoffice-users] selecting cells in calc sheet

The main thing I'm not understanding is whether the formula is to be one fixed place or if after 3 
data points it is in cell X but after 4 data points it is in cell Y. The solution I gave you 
applies to the latter case.

For the former case I would use a more complex formula like this using your latest specification.

=IF(COUNT(A1:A50)>2,AVERAGE(OFFSET(A1,0,COUNT(A1:A50)-3,1,3))-30,"")

That says, if there are more than two values then define a horizontal range composed of the last 
three filled cells, average that range, and subtract 30. This works as long as they are no empty or 
text cells before the values of interest in A1:A50. This process gets a little bit (to say the 
least) more hairy if there are intervening cells.

-- 
Jim

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