Calculations with previous row

[SaCvP125]

Hi guys,

I've the following dataset that shows me the numbe of consumed and losted tickets in last 4 years. And I know that I have 32 tickets consumed for the next year.

Tickets_Consumed	Year	Tickets_Losted	Year
10	2017	3	2017
25	2016	35	2016
8	2015	31	2015
1	2014	12	2014

And I'm trying to calculate the following formula in PowerBI:

Tickets_Consumed	Year	Tickets_Losted	Year		Result
10	2017	3	2017		39 (32+10-3)
25	2016	35	2016		29 (39+25-35)
8	2015	31	2015		6 (29+8-31)
1	2014	12	2014		-5 (6+1-12)

How do I get the result:

Current_Number of Tickets Consumed = 32
Number of Tickets Consumed;

Number of Tickets Losted;

How can I do this using PowerBI? I can share the excel to see what I'm calculating

Thanks

[BILASolution · Accepted solution]

Hi @SaCvP125

Try this measures...

Total Consumed = SUM(Table1[Tickets Consumed]) 

Total Losted = SUM(Table1[Tickets Losted]) 

Current Number = 32 

Result = var actualyear = FIRSTNONBLANK(Table1[Year];1) return 

           CALCULATE([Current Number] + [Total Consumed] - [Total Losted];ALL(Table1);Table1[Year]>=actualyear) 

and this is the final result...

I hope this helps

Regards

BILASolution

[Anonymous]

@BILASolution

Your solution is pretty slick. It looks simple but it's surprisingly little hard to undersatnd fully. Do you mind being so kind to explain how your code works: 

Result =
VAR actualyear = FIRSTNONBLANK ( Table1[Year]; 1 )
RETURN
    CALCULATE (
        [Current Number] + [Total Consumed] - [Total Losted];  
        ALL ( Table1 );
        Table1[Year] >= actualyear
    )

Thanks

[BILASolution]

Hi @Anonymous

The next picture is a summary of the logic that I used...I hope you could understand

Regards

BILASolution

[Zubair_Muhammad]

Hi @SaCvP125

This calculated column shall get you desired result hopefully.

Modify Table Name

Result=
32
    + CALCULATE (
        SUM ( Table1[Tickets_Consumed] ),
        FILTER ( Table1, Table1[Year] >= EARLIER ( Table1[Year] ) )
    )
    - CALCULATE (
        SUM ( Table1[Tickets_Losted] ),
        FILTER ( Table1, Table1[Year] >= EARLIER ( Table1[Year] ) )
    )

[Zubair_Muhammad]