Reply
Regular Visitor
Posts: 32
Registered: ‎03-10-2016
Accepted Solution

DAX Adding offset to previous row

Hi,

 

I would like to create a column either in DAX or M where the some row are a date from another column and some are the previous row plus an offset, like:

 

IF(TABLE[INITIAL] = TRUE();
  TABLE[CREATED];
  DATEADD(TABLE[value from previous row];TABLE[OFFSET])
)

any suggestions are appriciated

 


Accepted Solutions
Highlighted
Moderator
Posts: 1,386
Registered: ‎03-06-2016

Re: DAX Adding offset to previous row

Hi @eacy,

 

Yes, we can achieve this requirement is Power BI by adding a calculated column. In your scenario, did you encounter any issue when using this formula?

 

In DAX you can’t reference the previous row in any way because there is no order to the rows, So fi you need to get previous row, you can create a rank column, and then use LOOKUPVALUE function to get it.

Rank = RANKX('TABLE','TABLE'[ID],,1)
Previous = LOOKUPVALUE('TABLE'[CREATED],'TABLE'[Rank],'TABLE'[Rank]-1)
Column = IF('TABLE'[INITIAL]=1,'TABLE'[CREATED],DATEADD('TABLE'[Previous],'TABLE'[OFFSET],DAY))

Capture.PNG

 

Reference

http://www.powerpivotpro.com/2015/03/how-to-compare-the-current-row-to-the-previous-row-in-power-piv...

 

Regards,

Charlie Liao

View solution in original post


All Replies
Highlighted
Moderator
Posts: 1,386
Registered: ‎03-06-2016

Re: DAX Adding offset to previous row

Hi @eacy,

 

Yes, we can achieve this requirement is Power BI by adding a calculated column. In your scenario, did you encounter any issue when using this formula?

 

In DAX you can’t reference the previous row in any way because there is no order to the rows, So fi you need to get previous row, you can create a rank column, and then use LOOKUPVALUE function to get it.

Rank = RANKX('TABLE','TABLE'[ID],,1)
Previous = LOOKUPVALUE('TABLE'[CREATED],'TABLE'[Rank],'TABLE'[Rank]-1)
Column = IF('TABLE'[INITIAL]=1,'TABLE'[CREATED],DATEADD('TABLE'[Previous],'TABLE'[OFFSET],DAY))

Capture.PNG

 

Reference

http://www.powerpivotpro.com/2015/03/how-to-compare-the-current-row-to-the-previous-row-in-power-piv...

 

Regards,

Charlie Liao

Regular Visitor
Posts: 32
Registered: ‎03-10-2016

Re: DAX Adding offset to previous row

Hi Charlie Liao,

 

Thanks, this sound plausible, I will try to see if I can find the time to test this today.