DAX - How to: Identify cycles & calculated score based on pair logic

[h4n1234]

Hi - I am looking for some advice / guidance on how to solve the following DAX challenge

Goal: To group the meetings by cycle to find the difference between the score of their first meeting of the cycle and their last.

The yellow columns are what I'd like to achieve:

Plus a measure to calculate the score difference.

Include = only includes cycle's where there is a pair

Cycle = The meeting type needs to be part of one of the following pairs:

A & D

A & B

A & C

B & D

• Type D ends a cycle, but when their isn't a D it will take C as the end (or B if C doesn't exsit)
• Type A starts a cycle, but when their isn't an A at the start for example for Attendee 2, B comes first which is pair with D, so this is cycle 1
• For Attendee 1, they have x3 meeting type C consecutively, so it takes the last one of the 3
• An attendee can have infinite cycles

Thank you!

[Anonymous]

Hi @h4n1234 ,

Any updates?

Best Regards,
Eyelyn Qin

[h4n1234]

Hi @Anonymous 

I still need to add in some more logic to get the whole solution working but your DAX helped me to develop the foundation DAX - really appreciate your help. 

[Anonymous · Accepted solution]

Hi @h4n1234 ,

I have created many measures to achieve such output, please follow:

Rank by Type = RANKX(FILTER(ALL('Table'),[AttendeeID]=MAX('Table'[AttendeeID])),CALCULATE(MAX('Table'[Meeting Type])),,ASC,Dense)

Start Flag = 
var _pre= MAXX(FILTER(ALL('Table'),[AttendeeID]=MAX('Table'[AttendeeID]) && [AttendeeIndex]=MAX('Table'[AttendeeIndex])-1),[Rank by Type])
return 
SWITCH(TRUE(),  MAX('Table'[AttendeeIndex])=1,1, _pre>[Rank by Type],1)

each pair start rank = 
var _rank=RANKX(FILTER(ALL('Table'),[AttendeeID]=MAX('Table'[AttendeeID]) && [Start Flag]=1),CALCULATE( MAX('Table'[AttendeeIndex])),,ASC,Dense)
return IF([Start Flag]<>BLANK(),_rank,BLANK())

End Flag = 
var _next= MAXX(FILTER(ALL('Table'),[AttendeeID]=MAX('Table'[AttendeeID]) && [AttendeeIndex]=MAX('Table'[AttendeeIndex])+1),[Rank by Type])
return 
SWITCH(TRUE(), _next<>BLANK()&& _next<[Rank by Type],1 , _next=BLANK(),1)

each pair end rank = 
var _rank=RANKX(FILTER(ALL('Table'),[AttendeeID]=MAX('Table'[AttendeeID]) && [End Flag]=1),CALCULATE( MAX('Table'[AttendeeIndex])),,ASC,Dense)
return IF([End Flag]<>BLANK(),_rank,BLANK())

Now we could calcualte the Cycle and Include:

Cycle = IF([each pair start rank]<>BLANK(),[each pair start rank],IF([each pair end rank]<>BLANK(),[each pair end rank]))

Include = IF( OR([each pair start rank],[each pair end rank])=FALSE() || [each pair start rank]=[each pair end rank] ,BLANK(),1)

Best Regards,
Eyelyn Qin
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[h4n1234]

So now I want to find the difference between the first score of a cycle and the last (where include = 1). And then plot the values on a graph. 

Any ideas how I'd go about this?

I've tried switch statements to get the first and last scores but this will not format in a graph (it is also very slow) - thanks in advance!

8. First Score = 
VAR _score =
    SWITCH (
        TRUE (),
        [2. Start Flag] = 1
            && [7. Include] = 1, SUM ( 'Table'[Score] ),
        BLANK ()
    )
RETURN
    _score

[h4n1234]

wow - thank you Eyelyn! I'll take a look at this today.