topic Re: First occurrence in a measure in DAX Commands and Tips

First occurrence in a measure

apurva989 — Wed, 25 Aug 2021 15:35:13 GMT

Hi folks,

I've been scratching my head over this issue and read through multiple forum posts but nothing has helped me so far. Sample data below:

I have four fields here:

Index - unsummarized column from my source (column)

Wafer Sum = Summarized column

Cumulative Sum = Running total of Wafer Sum per Index column (Quick Measure)

Flag = Toggles between Yes and No based on following condition ( [Cumulative Sum] >= [Wafer Sum] * 0.5) (Measure)

What I'm trying to accomplish is get the first occurrence when the Flag = "Yes" and return the Index value. In this case, the Index value returned should be 25. However, I cant use most of the functions such as EARLIER, MINX or CALCULATE since they are catered towards columns and not measures.

Any help on this issue is appreciated. Thanks in advance!

Re: First occurrence in a measure

amitchandak — Wed, 25 Aug 2021 17:09:54 GMT

apurva989 , Try a measure like

minx(filter(values(Table[Index]), [Cumulative Sum] >= [Wafer Sum] * 0.5), [index])

Or are you looking for percentile?

example

https://blog.enterprisedna.co/implementing-80-20-logic-in-your-power-bi-analysis/
https://forum.enterprisedna.co/t/testing-the-pareto-principle-80-20-rule-in-power-bi-w-dax/459

Re: First occurrence in a measure

apurva989 — Wed, 25 Aug 2021 17:22:12 GMT

Hey @amitchandak Almost there!

Your formula does give me an index value but I'm looking for the first index value where the flag is yes. The value I'm getting right now is Index = 2. Should be 25. No percentile, just a plain lookup against the index column.

The flag measure I created is using the following formula:

if ([Cumulative Sum] >= [Wafer Sum], "Yes","No")

Thanks for your help!

Re: First occurrence in a measure

amitchandak — Wed, 25 Aug 2021 17:35:31 GMT

apurva989 , based on this ( if ([Cumulative Sum] >= [Wafer Sum], "Yes","No") ) , it should be like

minx(filter(values(Table[Index]), [Cumulative Sum] >= [Wafer Sum] ), [index])

You yes condition should be in the filter

Re: First occurrence in a measure

apurva989 — Wed, 25 Aug 2021 18:11:47 GMT

Thanks! I got the correct answer after I added the underlying filters 🙂