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liamcol
Frequent Visitor

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

liamcol_0-1613347955854.png

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!

 

4 REPLIES 4
wdx223_Daniel
Super User II
Super User II

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

Nathaniel_C
Super User I
Super User I

Hi @liamcol 
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

 

image.png

 


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





Did I answer your question? Mark my post as a solution!

Proud to be a Super User!




I am unsure what to put for this rows measure? 

 

Thanks

 

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

mytable.PNG


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

 





Did I answer your question? Mark my post as a solution!

Proud to be a Super User!




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