Previous Row Value

[Greg]

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Below are a few examples of issues related to the Previous Row Value DAX Pattern from the eDNA resources.

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DAX Row minus Previous Row

@Archer, OK, RankX-based index works like a champ. DAX Index = RANKX( ALL( 'Table' ), [Date],, ASC, Dense ) Retrieving the previous value just requires a couple of tweaks to our prior Previous Value measure - creation of a new variable to track our current row position, and referencing DAX Index instead of the PQ-created index we used before: Previous Value2 = VAR SelRow = 'Table'[DAX Index] VAR PrevIndx = CALCULATE( MAX( 'Table'[DAX Index] ), FILTER( 'Tab…

Calculating Difference Between Dates in Same Column with Multiple Events on Same Day

You’re absolutely right – I was WAY overcomplicating this. With a fresh look at it, all I needed to do to adapt the solution you provided was to create one more variable to calculate the first date for each action, and then wrap the RETURN expression in a CALCULATE ( IF ( ) ) to handle the first date issue and any subsequent blank dates. Greatly appreciate your expertise and willingness to work through this with me. I’ve learned a ton through this process, and will be able to reuse this meas…

Using measures for Date column rather than Index col for row context

Jarvis, I think I have come up with a solution using what you have provided. I have attached the PBIX with my changes. Here is a snapshot of what it looks like: [image] EDNA Forum- test 2020 v2.pbix (183.7 KB) Thanks Jarrett

Count Consecutive Months that a measure was positive or negative

@nickjordan32, This is a really interesting problem that I’ve been thinking about since you posted it initially, and think I finally cracked it. Had to throw a lot of DAX at it - here are the highlights: Used a series of table functions to create a physical table (pTable) summarizing the relevant fields and measures, where Total Over Under was not blank (but could be zero): pTable = VAR vTable= FILTER( ADDCOLUMNS( SUMMARIZE( Dates, Dates[MonthInCalenda…

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