使用 ARRAYFORMULA 扩展一个困难的公式，同时避免循环引用（谷歌表格）

Question

I'm trying to set up a formula in Google Sheets that does this...

=IF(IFERROR(INDEX(Matches!$L$2:$L,MATCH($A2&(B$1-14),Matches!$H$2:$H&Matches!$M$2:$M,0)))=1,
IFERROR(OFFSET($A$1,INDEX(Matches!$I$2:$I,MATCH($A2&(B$1-14),Matches!$H$2:$H&Matches!$M$2:$M,0)),COLUMN()-1)-(1/(2*($A2)^2))),
$A2)

That is to say, IF(match was won, take the current period's rank of your defeated opponent and do math to it, else show last period's rank).

But I want to set it into an ARRAYFORMULA so that it will expand automatically. What I have is this (and it doesn't work):

=ARRAYFORMULA(IF(IFERROR(VLOOKUP($A$2:$A&($B$1:$1-14),{Matches!$H$2:$H&Matches!$M$2:$M,Matches!$L$2:$L},2,0))=1,
OFFSET($A$1,VLOOKUP($A$2:$A&($B$1:$1-14),{Matches!$H$2:$H&Matches!$M$2:$M,Matches!$I$2:$I},2,0),SEQUENCE(1,COUNTA($B$1:$1),2,1))-(1/(2*($A$2:$A)^2)),
$A$2:$A))

What it should look like is this:

https://i.stack.imgur.com/Ui3nE.png

How it actually comes out is:

https://i.stack.imgur.com/tQOl7.png

All of those errors are the same message, which is that VLOOKUP couldn't find 143997, which is just the first value pair. I've tried using VLOOKUP/MATCH, but it produces a circular reference error.

Is this possible? I'm willing to believe it's not, but I thought I should ask. Thanks for any help you can offer.

Answer 1

You can't use that OFFSET formula within ARRAYFORMULA . When the VLOOKUP throws an error the OFFSET is not able to handle it. That's why it won't work. You should apply your math on the output of the VLOOKUP .