On 2021-12-15 14:11, Hylton Conacher (ZR1HPC) wrote:
...
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 [spaced for comprehension]
Date/Time [stamp] | 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($Data.A4,10)'. Column B of this sheet needs to be the SUM of all
the numbers in the 3rd column, BUT only for the date in column A i.e.
2010-10-08| 17
2010-10-09| 12
...
..
.
Just trying to understand your question properly, so for clarification:
(1a) Your two sheets differ in column A, in that the first has a date/time
stamp, the second date only (extracted from the first)?
(1b) Does each row of the second sheet reflect the date of the corresponding
row in the first sheet (in other words, dates are repeated on the second sheet,
as suggested by your formula ($Data.A4, $Data.A5, $Data.A6, ...), or is each
date on the second sheet listed just once?
(2) We don't need to worry about columns B or D of the first sheet, just
column C? [Any significance to columns B-C-D being indexed in three different
formats (Numeric-UPPERCASE-lowercase)?]
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.
(3a) Did you try confirming that conjecture using a test example with just the
date, not a date/time stamp?
(3b) How is that date/time field acquired? Could it be acquired/input as two
separate fields, date and time?
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())/vlookupÂ
argument.
(4) [This is related to questions 1 and 3] Given that you acquire the date for
your second sheet's column A as a text field, is there a possible data type
mismatch?
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