Formula challenge - How to write a formula that returns non-duplicate items from a list?

[mfexcel]

Hi all experts,
I am wondering if I could create a dynamic name range that returns only non-duplicate items from a list?

e.g. in cell A1:A6, I have
Apple
Apple
Apple
Banana
Grape
Grape

I want to create a dynamic name range that returns only Apply,Banana,Grape.

Is it possible?

Any hints are appreciate!

 

[mfexcel]

Hi Aladin,
Thanks so much. This is also nice!!
Noted that you have put "~"& and &"" in the Match formula, is there any special reason for that?? coz i tried to put that out and the formula seems working well too.
actually, i don't get the usage of array very well when the "Criteria" is a range rather than just a value or logic...
Appreciate your advise.

A single formula approach...

B1, control+shift+enter, not just enter, and copy down:

=IFERROR(INDEX($A$1:$A$7,SMALL(IF(FREQUENCY(IF($A$1:$A$7<>"",
  MATCH("~"&$A$1:$A$7,$A$1:$A$7&"",0)),ROW($A$1:$A$7)-ROW($A$1)+1),
  ROW($A$1:$A$7)-ROW($A$1)+1),ROWS(B$1:B1))),"")

 

[Aladin Akyurek]

Hi Aladin,
Thanks so much. This is also nice!!
Noted that you have put "~"& and &"" in the Match formula, is there any special reason for that?? coz i tried to put that out and the formula seems working well too.
actually, i don't get the usage of array very well when the "Criteria" is a range rather than just a value or logic...
Appreciate your advise.

Those bits are meant to counteract special meaning chars like <, etc. If they can't occur in your situation, drop them. That would improve the efficiency somewhat...

=IFERROR(INDEX($A$1:$A$7,SMALL(IF(FREQUENCY(IF($A$1:$A$7<>"",
  MATCH($A$1:$A$7,$A$1:$A$7,0)),ROW($A$1:$A$7)-ROW($A$1)+1),
  ROW($A$1:$A$7)-ROW($A$1)+1),ROWS(B$1:B1))),"")

 

[markmzz]

Hi Mfexcel,

Did you try my formula of post #7?

If yes, what you got?

Markmzz

 

[mfexcel]

Hi Markmzz,
with your formula, i get only "Apple"...

Hi Mfexcel,

Did you try my formula of post #7?

If yes, what you got?

Markmzz

 

[markmzz]

Hi Markmzz,
with your formula, i get only "Apple"...

Hi Mfexcel,

Here the formula work like you can see in the post #7.

Could you post the formula that you used?

Did you try with the layout of the post #7?

Markmzz

 

[ootkhopdi]

Dear Sir

can we create unique list without Array Formula, Which calculate faster

Ankur

 

[markmzz]

Dear Sir

can we create unique list without Array Formula, Which calculate faster

Ankur

Hi Ankur,

Could you explain better what you have and what you want? With words and examples?

Markmzz

 

[Aladin Akyurek]

Dear Sir

can we create unique list without Array Formula, Which calculate faster

Ankur

One option is to run Advanced Filter. Another is invoking a formula where memory is traded of against speed.

 

[mfexcel]

Data --> Remove Duplicates
that helps you to create a unique list quickly without any formulation.
depends on what you try to do, you don't have to use the array formula discussed which serves another purpose.

Dear Sir

can we create unique list without Array Formula, Which calculate faster

Ankur

 

[Aladin Akyurek]

Data --> Remove Duplicates
that helps you to create a unique list quickly without any formulation.
depends on what you try to do, you don't have to use the array formula discussed which serves another purpose.

Certainly a good idea, but manual. If a somewhat fast formula approach is wanted, for a generic (non-conditional) case we can have:

[TABLE="width: 202"]
<TBODY>[TR]
[TD="class: xl64, width: 91, bgcolor: transparent"]ITEMS
[/TD]
[TD="class: xl64, width: 64, bgcolor: transparent, align: right"]0
[/TD]
[TD="class: xl63, width: 115, bgcolor: transparent, align: right"]3
[/TD]
[/TR]
[TR]
[TD="class: xl63, bgcolor: transparent"]Apple
[/TD]
[TD="class: xl63, bgcolor: transparent, align: right"]1
[/TD]
[TD="class: xl64, bgcolor: transparent"]Unique List
[/TD]
[/TR]
[TR]
[TD="class: xl63, bgcolor: transparent"]Apple
[/TD]
[TD="class: xl63, bgcolor: transparent"][/TD]
[TD="class: xl63, bgcolor: transparent"]Apple
[/TD]
[/TR]
[TR]
[TD="class: xl63, bgcolor: transparent"]Apple
[/TD]
[TD="class: xl63, bgcolor: transparent"][/TD]
[TD="class: xl63, bgcolor: transparent"]Banana
[/TD]
[/TR]
[TR]
[TD="class: xl63, bgcolor: transparent"]Banana
[/TD]
[TD="class: xl63, bgcolor: transparent, align: right"]2
[/TD]
[TD="class: xl63, bgcolor: transparent"]Grape
[/TD]
[/TR]
[TR]
[TD="class: xl63, bgcolor: transparent"]Grape
[/TD]
[TD="class: xl63, bgcolor: transparent, align: right"]3
[/TD]
[TD="class: xl63, bgcolor: transparent"][/TD]
[/TR]
[TR]
[TD="class: xl63, bgcolor: transparent"]Grape
[/TD]
[TD="class: xl63, bgcolor: transparent"][/TD]
[TD="class: xl63, bgcolor: transparent"][/TD]
[/TR]
</TBODY>[/TABLE]

B1 must house a 0.

B2, copied down:

=IF(ISNUMBER(MATCH(A2,$A$1:A1,0))+(A2=""),"",
  LOOKUP(9.99999999999999E+307,$B$1:B1)+1)

C1, just enter:

=LOOKUP(9.99999999999999E+307,B:B)

C3, just enter and copy down:

=IF(ROWS($C$3:C3)<=$C$1,LOOKUP(ROWS($C$3:C3),B:B,A:A),"")

Note that the foregoing set up trades off memory against time (speed).