Forum Discussion
Seeking Code/VBA for Average WaitTime Per Hour
A spreadsheet is attached that computes the average wait time for each hour of a day you select. This relies entirely on functions that are only available in newer versions of Excel, so if it doesn't work for you that would be the reason. Blank fields are not included in the calculation of averages, so if that's what you meant by "blanks in the 'OutTime' column that need to be accounted for" then there's no reason to worry. They are not reducing the averages.
It looks like this:
NOT the Test Data file; the ACTUAL file. The one you've been posting images of. That one!
OK, I did it with the test data file.
The key is that the criteria in the FILTER portion of the formula have to refer to the column with the dates and the row with the numbers of the hour.
This is the formula that gets average wait times:
=IFERROR(AVERAGE(FILTER(Sheet1!$E$2:$E$243,(HOUR(Sheet1!$C$2:$C$243)='Summary Data'!B$3)*(Sheet1!$B$2:$B$243='Summary Data'!$A4))),"")
The heart of that is this FILTER portion, so here's a bit of explanation of it. Again, you should refer to those sources I gave you before. Once you understand it, it's a very useful function. You also should look up some references, I suspect, to "Absolute References" and "Relative References"
FILTER(Sheet1!$E$2:$E$243, this specifies the range to be filtered
(HOUR(Sheet1!$C$2:$C$243)='Summary Data'!B$3).
first criterion, where the hour = number in row 3. Referring to it as B$3 is a case of the B being a relative reference, $3 is absolute so as you copy it to other rows and columns the B can adjust to C, D, E, etc. but the $3 stays constant,
* "*" connects both criteria as AND(Sheet1!$B$2:$B$243='Summary Data'!$A4))
second criterion gets dates equal to date in column A, and as this gets copied, the A stays constant but the row number changes.
