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#1
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count duplicates
Hi there,
I have a column on numbers and I was wondering if I can add a formula to the bottom of the column that would tell me how many dublicate numbers there are. thanks in advance for your time. |
#2
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count duplicates
hi jt,
=COUNTA(A1:A100)-COUNT(1/FREQUENCY(A2:A100,ROW(INDIRECT("1:"&ROWS(A2:A100)) ))) -- isabelle Le 2012-04-09 17:27, jt a écrit : Hi there, I have a column on numbers and I was wondering if I can add a formula to the bottom of the column that would tell me how many dublicate numbers there are. thanks in advance for your time. |
#3
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count duplicates
On Mon, 9 Apr 2012 14:27:36 -0700 (PDT), jt wrote:
Hi there, I have a column on numbers and I was wondering if I can add a formula to the bottom of the column that would tell me how many dublicate numbers there are. thanks in advance for your time. If you want a count of unique duplicates, in other words, if the sequence: 1 2 2 2 2 1 1 should return 2 (duplicate numbers = 1 and 2), then try: =SUM(--(FREQUENCY(A:A,A:A)1)) If this sequence should return 5 (1 is duplicated twice; 2 is duplicated thrice), then use Isabelle's formula |
#4
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count duplicates
On Apr 9, 6:59*pm, isabelle wrote:
hi jt, =COUNTA(A1:A100)-COUNT(1/FREQUENCY(A2:A100,ROW(INDIRECT("1:"&ROWS(A2:A100)) *))) -- isabelle Le 2012-04-09 17:27, jt a écrit : Hi there, I have a column on numbers and I was wondering if I can add a formula to the bottom of the column that would tell me how many dublicate numbers there are. thanks in advance for your time. sorry but it doesn't seem to work, maybe i need to reword it, i would like to count the number of unique entries.... |
#5
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count duplicates
On Apr 9, 9:20*pm, john taiariol wrote:
On Apr 9, 6:59*pm, isabelle wrote: hi jt, =COUNTA(A1:A100)-COUNT(1/FREQUENCY(A2:A100,ROW(INDIRECT("1:"&ROWS(A2:A100)) **))) -- isabelle Le 2012-04-09 17:27, jt a écrit : Hi there, I have a column on numbers and I was wondering if I can add a formula to the bottom of the column that would tell me how many dublicate numbers there are. thanks in advance for your time. sorry but it doesn't seem to work, maybe i need to reword it, i would like to count the number of unique entries.... what if the numbers are actually text?? |
#6
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count duplicates
On Mon, 9 Apr 2012 18:20:37 -0700 (PDT), john taiariol wrote:
sorry but it doesn't seem to work, maybe i need to reword it, i would like to count the number of unique entries.... =SUM(--(FREQUENCY(A:A,A:A)0)) |
#7
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count duplicates
hi jt,
the first part (=COUNTA(A1:A100)) is all entries the second part of the formula is the unique entries =COUNT(1/FREQUENCY(A2:A100,ROW(INDIRECT("1:"&ROWS(A2:A100)) ))) subtract the second part from the first gives the number of duplicates -- isabelle Le 2012-04-09 21:20, john taiariol a écrit : On Apr 9, 6:59 pm, wrote: hi jt, =COUNTA(A1:A100)-COUNT(1/FREQUENCY(A2:A100,ROW(INDIRECT("1:"&ROWS(A2:A100)) *))) -- isabelle Le 2012-04-09 17:27, jt a écrit : Hi there, I have a column on numbers and I was wondering if I can add a formula to the bottom of the column that would tell me how many dublicate numbers there are. thanks in advance for your time. sorry but it doesn't seem to work, maybe i need to reword it, i would like to count the number of unique entries.... |
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