topic Re: Creating a measure in Dax to calculate difference between two rows (similar to excel) in DAX Commands and Tips

Creating a measure in Dax to calculate difference between two rows (similar to excel)

Anonymous — Mon, 15 Feb 2021 00:16:19 GMT

I would like to create a new column which would measure the difference between the two rows to find the "scan length"

What would be the DAX formula for this?

Thanks!

Re: Creating a measure in Dax to calculate difference between two rows (similar to excel)

Nathaniel_C — Mon, 15 Feb 2021 02:34:06 GMT

Hi Anonymous
Try this:

Diff = var _curMeasure = MAX(myTable[Measure]) //This row's measure var _curTime = MAX(myTable[Time]) //This row's time var _calc = CALCULATE(MAX(myTable[Measure]),FILTER(ALL(myTable),myTable[Time]<_curTime)) //Get the measure of the previous row return IF(_curMeasure-_calc=_curMeasure,0,_curMeasure-_calc) //if there is no previous measure, then 0 else the diff

Let me know if you have any questions.

If this solves your issues, please mark it as the solution, so that others can find it easily. Kudos 👍are nice too.
Nathaniel

Re: Creating a measure in Dax to calculate difference between two rows (similar to excel)

Anonymous — Mon, 15 Feb 2021 04:52:58 GMT

I am unsure what to put for this rows measure?

Thanks

Re: Creating a measure in Dax to calculate difference between two rows (similar to excel)

wdx223_Daniel — Mon, 15 Feb 2021 05:11:14 GMT

new column=maxx(filter(table,table[Local Time]>earlier(table[Local Time])),table[Local Time])-table[Local Time]

Re: Creating a measure in Dax to calculate difference between two rows (similar to excel)

Nathaniel_C — Mon, 15 Feb 2021 15:24:06 GMT

Hi Anonymous ,
As you did not supply us with a pbix, I created a quick table called myTable with the columns named Time and Measure.

Let me know if you have any questions.

If this solves your issues, please mark it as the solution, so that others can find it easily. Kudos 👍are nice too.
Nathaniel