how many duplicates in the one column

[J Walia]

i have about 7000 rows with 5 column but one column has some duplicates i
would like to count duplicates as ones and single as ones also
A B
1 Nika Well
2 Nika Well
3 Mikaney
4 Lisa Web
5 Lisa Web

i used formula as
=sumif(IF(FREQUENCY(MATCH(B2:B5,B2:B5,0),MATCH(B2:B5,B2:B5,0))>0,1))
IT GIVE ME THE WRON aSNWER because there is space after B2 cell how i can
trim it before use the Match help me any one

 

[Jacob Skaria]

Please note that this is an array formula. press CTRL+SHIFT+ENTER to enter
the formula. If successful in 'Formula Bar' you can notice the curly braces
at both ends like "{=<formula>}"

=SUM(IF(FREQUENCY(MATCH(TRIM(B2:B5),TRIM(B2:B5),0),
MATCH(TRIM(B2:B5),TRIM(B2:B5),0))>0,1))

If this post helps click Yes

 

[Teethless mama]

=SUMPRODUCT((A1:A5<>"")/COUNTIF(A1:A5,A1:A5&""))

 

[T. Valko]

=SUM(IF(FREQUENCY(MATCH(TRIM(B2:B5),TRIM(B2:B5),0),

MATCH(TRIM(B2:B5),TRIM(B2:B5),0))>0,1))

That'll count empty cells.

 

[T. Valko]

i have about 7000 rows

=SUMPRODUCT((A1:A5<>"")/COUNTIF(A1:A5,A1:A5&""))

Array entered** :

=SUM(IF(FREQUENCY(IF(A1:A7000<>"",MATCH(A1:A7000,A1:A7000,0)),ROW(A1:A7000)-ROW(A1)+1),1))

** array formulas need to be entered using the key combination of
CTRL,SHIFT,ENTER (not just ENTER). Hold down both the CTRL key and the SHIFT
key then hit ENTER.

The array formula is significantly more efficient on a range that size.

AVG calc time on 7000 rows:

SUMPRODUCT = 2.88 secs
FREQUENCY = 0.09 secs

 

[Jacob Skaria]

Biff, I think you have missed the point which OP is raising.

"there is space after B2 cell how i can trim it before use the Match"

If this post helps click Yes

 

[T. Valko]

Biff, I think you have missed the point which OP is raising.

No, that was already answered. I was making a suggestion based on the
generic count of uniques formula TM posted with regards to "big" ranges.