Calculated Column - Need Assistance with formula

[Mitchell92]

Hi all,

I have the below calculated column that works fairly well to calculate timeframe between events in a table based on a "Key":

DaysBetweenEvents = if(VAR temp=TOPN(1,Filter(vwACCCSTWorkload2,vwACCCSTWorkload2[Key]=earlier(vwACCCSTWorkload2[Key])&&'vwACCCSTWorkload2'[Date]<earlier(vwACCCSTWorkload2[Date])),'vwACCCSTWorkload2'[Date],DESC)
RETURN 
DATEDIFF(MINX(temp,'vwACCCSTWorkload2'[Date]),'vwACCCSTWorkload2'[Date],day) =0,0,VAR temp=TOPN(1,Filter(vwACCCSTWorkload2,vwACCCSTWorkload2[Key]=earlier(vwACCCSTWorkload2[Key])&&'vwACCCSTWorkload2'[Date]<earlier(vwACCCSTWorkload2[Date])),'vwACCCSTWorkload2'[Date],DESC)
RETURN 
DATEDIFF(MINX(temp,'vwACCCSTWorkload2'[Date]),'vwACCCSTWorkload2'[Date],day))

The "IF" formula is just added to place 0's in the cell if the result is 0 for the purpose of averaging.

The problem I am facing is that when two or more events are registered on the same day, the same calculation occurs per previous date and the same result is referenced for those two or more cells.

I would like it to calculate the timeframe between Event 1 and 2 initially, and then subsequent events registered on the same day should be zero.

Example below:

Hoping someone may be able to please assist with this?

Thanks,

Mitch

[Mitchell92]

I have added in an index table for the events which may make this calc easier. I'm assuming index just needs to be added to check for an earlier index value per Key, but I can't get it to work unfortunately.

[v-cgao-msft]

Hi @Mitchell92 ,

Please try:

DaysBetweenEvents = 
VAR _index =
    CALCULATE (
        MIN ( 'vwACCCSTWorkload2'[Index] ),
        FILTER (
            ALL ( 'vwACCCSTWorkload2' ),
            'vwACCCSTWorkload2'[Key] = EARLIER ( vwACCCSTWorkload2[Key] )
                && 'vwACCCSTWorkload2'[Date] >= EARLIER ( 'vwACCCSTWorkload2'[Date] )
        )
    )
RETURN
    IF (
        'vwACCCSTWorkload2'[Index] = _index,
        IF (
            VAR temp =
                TOPN (
                    1,
                    FILTER (
                        vwACCCSTWorkload2,
                        vwACCCSTWorkload2[Key] = EARLIER ( vwACCCSTWorkload2[Key] )
                            && 'vwACCCSTWorkload2'[Date] < EARLIER ( vwACCCSTWorkload2[Date] )
                    ),
                    'vwACCCSTWorkload2'[Date], DESC
                )
            RETURN
                DATEDIFF (
                    MINX ( temp, 'vwACCCSTWorkload2'[Date] ),
                    'vwACCCSTWorkload2'[Date],
                    DAY
                ) = 0,
            0,
            VAR temp =
                TOPN (
                    1,
                    FILTER (
                        vwACCCSTWorkload2,
                        vwACCCSTWorkload2[Key] = EARLIER ( vwACCCSTWorkload2[Key] )
                            && 'vwACCCSTWorkload2'[Date] < EARLIER ( vwACCCSTWorkload2[Date] )
                    ),
                    'vwACCCSTWorkload2'[Date], DESC
                )
            RETURN
                DATEDIFF (
                    MINX ( temp, 'vwACCCSTWorkload2'[Date] ),
                    'vwACCCSTWorkload2'[Date],
                    DAY
                )
        )
    )

Best Regards,
Gao
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly. If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

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[Mitchell92]

Hi Gao,

This is 99% perfect, thank you!! One last thing though - how do I make it return a zero if there are no days between events (instead of blanks). This will allow averages to include events with 0 rather than ignore.

Thank you!

[Mitchell92]

Hi @v-cgao-msft ,

I've put the formula into practice now and it seems to work well 90% of the time. I want to thank you initially for that - has helped demonstrate what I am after tremendously.

A problem I have noticed is when an event (in this case, I am using it as my "Index") date is greater than the previous event date, however, a smaller event/index with a later date exists, the formula does not calculate on those events. I am wondering if the formula can be adjusted to essentially calculate differences in date when the event/index has changed? I.e. so it still is 0 for multiple events registering on the same day?

Example below:

Thanks,

Mitch