Re: [libreoffice-users] SUM, SUMIF, IF, INDEX, MATCH, VLOOKUP?

Hi,

You can do this with an array formula. Before we start:
- The date/time values in column A are actual date values, not text
values - you will need to convert the information in Data.A4 to a real
date
The formula you will then want is this one:

=SUMIF(INT(Sheet1.A$2:Sheet1.A$5),CONCAT("=";Sheet2.A2),Sheet1.B$2:Shee
t1.B$5)

Once you have entered the formula, terminate with CTRL-SHIFT-Enter to
make it an array formula. It will show like this in the formula bar
(the curly braces are what you are looking for):

{=SUMIF(INT(Sheet1.A$2:Sheet1.A$5),CONCAT("=";Sheet2.A2),Sheet1.B$2:She
et1.B$5)}

Since the dates you have are real dates, they are actually numerical
values where the integer portion represents the year. The INT() of the
date range will extract that number and will be compared with the date
you extracted (BTW, I suggest you use INT($Data.A4) rather than the
character extraction you used).

This works well with your data sample.

I hope this helps.
Rémy.

Le mercredi 15 décembre 2021 à 21:11 +0200, Hylton Conacher (ZR1HPC) a
écrit :
> Hi,
>
> I am quickly losing patience with a task that requires a sum of
> values 
> that occur on the same date, but at different times.
>
> My raw data sheet is in 4 columns
> Date/Time | Value 1| Value Y| Value z
> 2021-10-08 08:00:00| 5| 7| 0.15
> 2021-10-08 14:05:16| 3| 10| 5
> 2021-10-09 10:05:30| 15| 3| 25
> 2021-10-09 18:00:00| 15| 9| 6
> ...
> ..
> .
>
> I have a secondary sheet with just the date i.e. 2010-10-08, acquired
> with formula `=LEFT($Data.A4,10)'. Column B of this sheet needs to be
> the SUM of all the numbers in the 3rd column, BUT only for the date
> in 
> column A i.e.
>
> 2010-10-08| 17
> 2010-10-09| 12
> ...
> ..
> .
>
> I have tried many Google searches and seen many videos on how this is
> supposed to work yet for some reason, being race, colour, creed, or 
> stupidity, I cannot get the result I seek. It would seem that the 
> summation of data with the same date, but different time component in
> the main data sheet is causing an issue.
>
> I'd really appreciate some pointers here, even if not possible. If
> not 
> possible what could be done. I just don't understand the 
> INDEX(MATCH())/vlookup  argument.


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