Comments on: Count Unique Days

By: Javier

Javier — Fri, 18 Mar 2011 20:03:00 +0000

Hi, I was trying to use this formula to count unique days but I was not able. Could you please help me?
I have a column F6 to F36 with short date and I have the following dates long the column: 3/10, 3/11, 3/12, 3/13. I would like to count how many unique days I have. I tried the above formula but I got the "#VALUE!".. Any idea?
Thanks in advance!!

By: shailesh bura

shailesh bura — Thu, 23 Dec 2010 10:52:00 +0000

The above function not working…
=SUM(IF(LEN(I7:I46),1/(COUNTIF(I7:I46,”<”&INT(I7:I46)+1)-COUNTIF(I7:I46,”<”&INT(I7:I46)))))

By: Dick Kusleika

Dick Kusleika — Fri, 13 Nov 2009 01:17:00 +0000

Matthew: Make sure you’re entering with Control+Shift+Enter as it is an array formula. If you are, then format all of your dates as ‘General’. This will make them look like numbers and any text you have in the list will stand out (because it will still look like a date).

By: Matthew Brent

Matthew Brent — Thu, 12 Nov 2009 16:44:00 +0000

I used Dick's original formula that started this thread and received the following error:

A value used in the formula is of the wrong data type set.

When I show the calculate steps used in evaluating the formula, it indicates that the range of data I selected will result in an error.

I formatted the entire range of cells as 'Date' > '3/14/01 13:30' to match the example, but the error is still returned.

I simply replaced the example range with my range.
Here is the exact formula text:
=SUM(IF(LEN(I7:I46),1/(COUNTIF(I7:I46,"<"&INT(I7:I46)+1)-COUNTIF(I7:I46,"<"&INT(I7:I46)))))

Am I missing a step? Thanks.

By: Dave

Dave — Wed, 09 Jul 2008 15:45:00 +0000

Matt,

Converting to a Long with CLng rounds decimals. Since the time portion of the date value is a decimal, you can easily end up with different dates being counted as the same (4pm of one day is the same as 4am the next day after rounding).

To fix it, use Int to truncate the decimal instead:

If IsDate(rCell.Value) Then
cDays.Add rCell.Value, CStr(Int(rCell.Value))
End If

By: Heles Eugene

Heles Eugene — Sun, 23 Mar 2008 11:17:00 +0000

hi this is not a comment it looks more as a question:-)
SUMPRODUCT((WEEKDAY(ROW(INDIRECT($A$3&":"&$B$2))=D7))*((DAY(ROW(INDIRECT($A$3&":"&$B$2)))=13))
for Excel guru's the know already for what I'm looking for;right the number of weekdays(D7)&the 13th
my result =0
plrese help me

By: alok

alok — Sat, 20 Aug 2005 19:17:00 +0000

i want to know about the basics of macro programming in excel.

By: tbone

tbone — Tue, 27 Jul 2004 14:52:00 +0000

why not use an advanced filter, with unique=true?

then count that?

By: Koos

Koos — Thu, 24 Jun 2004 11:00:00 +0000

Do you have any suggestions as to expanding this functions with a condition?

I am trying to count unique values/dates per period, where I have the dates in one column and the periods(numeric representation of the month) in another column (if I can discard this latter column that would be even better).

Thanks in advance,

Koos

By: Dick

Dick — Fri, 14 May 2004 15:16:00 +0000

"The collection object might be a good topic for a future post!"

Geez, why didn't I think of that. Thanks, Matt.