Formula to flag duplicates ignoring initial entry

[NikiDivi]

Hello and good morning.

I'm using =IF(COUNTIF(F:F,F35)>1,"Duplicate","Initial") to flag duplicates but want the first entry to be labeled initial. Currently, all duplicates, including the initial entry, are being flagged as duplicates. I appreciate your time and assistance.

Thank you,
Nicole

 

[NikiDivi]

Thank you for your reply. I entered =MAP(F4:F7500,LAMBDA(x,IF(COUNTIF(F4:F7500,F4)>1,"Duplicate","Initial"))) because the data that I'm searching for duplicates is in Column F, rows 4 through 7500. Is this correct?

But the formula doesn't return any duplicates.

 

[Rick Rothstein]

But the formula doesn't return any duplicates.

That is because you changed the formula that I posted (you replaced my "x" with F4... that is wrong)... use the exact formula I posted. And yes to your first question... just modify the first range following the word "MAP" and leave everything else in the formula the way I typed it.

 

[NikiDivi]

OK. Thank you.

 

[Rick Rothstein]

As a follow up, if your data might grow in the future and you wanted to account for that growth in the formula without having to go back and change the end cell reference every time your data grows, use this formula instead which allows you to specify a larger end cell than your data currently occupies. So, assuming your data will never go past, say, Row 15000, then use this formula and it will correctly update as new data is entered (use this formula exactly as is, do not change anything except perhaps the 15000)...

=TOCOL(MAP(F4:F15000,LAMBDA(x,IF(x="",1/0,IF(COUNTIF(F4:x,x)>1,"Duplicate","Initial")))),2)

 

[NikiDivi]

Hi Rick, I did exactly what you said. I copied your formula over, changed only the first range following MAP, and left everything else the way you typed it. It still did not work correctly. The formula posted previously by Fluff did, however.

 

[Rick Rothstein]

Just so you know, I test my formulas (and VBA code when called for) before posting them, so without seeing you actual data, I can't be sure what the problem is. However, you have a solution, so go with that.

 

[NikiDivi]

Thanks again, Rick. I appreciate your time and assistance. I've noted the formula for future use when I have more time to try it.