At 18:04 27/04/2018 +0200, Hylton Conacher wrote:
I am running LibreOffice 5.4.6.2 and am using a spreadsheet to
enable me to draw graphs based on rainfall received per year, up
until the date prior to today. The figures also allow me to compare
current rainfall to date to the same period in a previous year. I
agree I should probably use Base but I do not think it would have
solved the issue.
**Example Data***
,,,,,
Month,Day,M/D,2016,2017,2018,Average('16->'17)
Apr,1.04/01,3,0,1,1.5
Apr,2,04/02,0,8,0,4
,,,,,,
,,,,,,
,,,,,,
Apr,26,04/26,0,0,20,0
Assuming today is Apr 2nd, a formula to count how many days of rain
there were in the current month would be =COUNTIF($F$2:$F2,">0").
Surely not? Rather something like =COUNTIF($F$94:$F94,">0").
The Total amount of rain that fell on that number of days, being 1,
was 1mm, ...
If we are talking 2018, that seems to be zero in your data.
... or taking it further 60% of the average rainfall to date for the month.
I don't know what fraction zero is of zero - as I'm not allowed to
divide by zero. Does your mathematics allow this?
Assuming today is Apr 27, a formula to count how many days of rain
there were in the current month is unknown, ...
Surely not? The current month (I think it's still 2018, unless some
catastrophe has happened without my knowing) has apparently had six
rainy days in your data.
... especially as there are undoubtedly values in the other un-shown
81 cells i.e. 3yrs and 27 remaining days?
Where are these "unshown" cells - somewhere else, and not in this
spreadsheet at all? And how can the "current month" - surely April
2018 - contain over three years' worth of days?
Basically take the starting cell reference $F$2 ...
Perhaps $F$3?
... and add the number of events that were ">0" to get the end
reference for the COUNTIF formula.
Now you've lost me ...
=COUNTIF($F$2:Add number of items ">0" to the starting line
reference 2, to get the end of the COUNTIF range) i.e. being Apr 27,
whilst there may be 26 days between the beginning of Apr and today
i.e. Today()-1, there are only two instances in the above table
where ">0" for a particular year, ...
Are you working with the current month - one month? Or with all the
Aprils in three years - three non-contiguous months? Or with the
period from 1 January 2016 up to yesterday? Or what?
... thus making 2 the number of days it rained, ...
That's still six in your spreadsheet.
... to receive the SUM of the 2018 rainfall being 21mm
Er, 67 mm?
Incidentally, you have the value 119 in L2 to indicate yesterday's
row number, but this has evidently been added manually and also must
be updated so. It should be fairly easy to establish this
automatically, and even to embed any such calculation in any formula.
Brian Barker
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