Entering Data
I have a large complex spreadsheet that calculates just when the file is saved. I was wondering if anyone new how to ensure that the same number is not entered twice into a column other than using the find command. Ryabn -- RJ31 ------------------------------------------------------------------------ RJ31's Profile: http://www.excelforum.com/member.php...o&userid=30451 View this thread: http://www.excelforum.com/showthread...hreadid=501138 |
Entering Data
Here are 2 formula's that will both work (Array formulas so commit with
CTRL+SHIFT+ENTER): 1) =SUMPRODUCT(IF(COUNTIF(A1:A20,A1:A20)1,1,0)) 2) =SUMPRODUCT(IF(COUNTIF(A1:A20,A1:A20)1,1,0)/COUNTIF(A1:A20,A1:A20)) #1 will count the total number of duplicates, so 1,1,2,3,4,5,5,5 will return 5 #2 will count the total number of UNIQUE duplicates, so 1,1,2,3,4,5,5, will return 2 Both formulas will return 0 if there are no duplicates. Just change the A1:A20 reference to match your data. Does that help? -- Regards, Dave "RJ31" wrote: I have a large complex spreadsheet that calculates just when the file is saved. I was wondering if anyone new how to ensure that the same number is not entered twice into a column other than using the find command. Ryabn -- RJ31 ------------------------------------------------------------------------ RJ31's Profile: http://www.excelforum.com/member.php...o&userid=30451 View this thread: http://www.excelforum.com/showthread...hreadid=501138 |
Entering Data
Check out Chip Pearson's site for method of preventing duplicate entries.
http://www.cpearson.com/excel/NoDupEntry.htm Gord Dibben MS Excel MVP On Fri, 13 Jan 2006 10:51:18 -0600, RJ31 wrote: I have a large complex spreadsheet that calculates just when the file is saved. I was wondering if anyone new how to ensure that the same number is not entered twice into a column other than using the find command. Ryabn |
Entering Data
Thanks for the replies. I am a coop student starting my first week. This helped very much. Thank you -- RJ31 ------------------------------------------------------------------------ RJ31's Profile: http://www.excelforum.com/member.php...o&userid=30451 View this thread: http://www.excelforum.com/showthread...hreadid=501138 |
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