Forum Discussion

jimbob741's avatar
jimbob741
Frequent Visitor
10 years ago
Solved

How to create Bar chart comparing 'This Week', 'Last Week', and 'This Week Last Year' data

Hello,

 

I've only just started with Power BI and DAX very recently, so am quite stuck with relation to this problem i'm having.

 

I would like a bar chart that will display 3 different results based on the week number of the year I have selected. I would like to select the week (e.g. 'week 35'), then from there I would like it to calculate the previous week, and previous week last year and display the results side by side.

 

The data is litterally just a 'Week Number' column with a 'Users' count as the value.

 

Please could someone help me with the steps needed to achieve this?

 

Many thanks in advance!

  • v-haibl-msft's avatar
    v-haibl-msft
    10 years ago

    jimbob741

     

    I’d like to give you a sample as below. The .pbix file has been upload here. I assume we have a table like below.

     

    We can first create a calendar table and create two columns with following formula. Create a relationship between these two tables with Date key.

    Calendar = CALENDAR ( "1/1/2015", "12/31/2016" )
    WeekNum = WEEKNUM ( 'Calendar'[Date] )
    Year = YEAR ( 'Calendar'[Date] )

     

    In original table, also create a WeekNum column.

    WeekNum = RELATED ( 'Calendar'[WeekNum] )

    Then we only need to create two measures to get 'Last Week' and 'This Week Last Year' data.

    Last Week = 
VAR CurrentWeekNum =
    MAX ( 'Calendar'[WeekNum] )
VAR CurrentYear =
    MAX ( 'Calendar'[Year] )
RETURN
    (
        CALCULATE (
            SUM ( Table1[Users] ),
            FILTER (
                ALL ( 'Calendar' ),
                'Calendar'[Year] = CurrentYear
                    && 'Calendar'[WeekNum]
                    = CurrentWeekNum - 1
            )
        )
)
    This Week Last Year = 
VAR CurrentWeekNum =
    MAX ( 'Calendar'[WeekNum] )
VAR CurrentYear =
    MAX ( 'Calendar'[Year] )
RETURN
    (
        CALCULATE (
            SUM ( Table1[Users] ),
            FILTER (
                ALL ( 'Calendar' ),
                'Calendar'[Year]
                    = CurrentYear - 1
                    && [WeekNum] = CurrentWeekNum
            )
        )
    )

    Drag two slicers for Year & WeekNum and a clustered bar chart into canvas.

     

    Best Regards,

    Herbert

6 Replies

  • v-haibl-msft's avatar
    v-haibl-msft
    Icon for Microsoft Employee rankMicrosoft Employee
    10 years ago

    jimbob741

     

    I’d like to give you a sample as below. The .pbix file has been upload here. I assume we have a table like below.

     

    We can first create a calendar table and create two columns with following formula. Create a relationship between these two tables with Date key.

    Calendar = CALENDAR ( "1/1/2015", "12/31/2016" )
    WeekNum = WEEKNUM ( 'Calendar'[Date] )
    Year = YEAR ( 'Calendar'[Date] )

     

    In original table, also create a WeekNum column.

    WeekNum = RELATED ( 'Calendar'[WeekNum] )

    Then we only need to create two measures to get 'Last Week' and 'This Week Last Year' data.

    Last Week = 
VAR CurrentWeekNum =
    MAX ( 'Calendar'[WeekNum] )
VAR CurrentYear =
    MAX ( 'Calendar'[Year] )
RETURN
    (
        CALCULATE (
            SUM ( Table1[Users] ),
            FILTER (
                ALL ( 'Calendar' ),
                'Calendar'[Year] = CurrentYear
                    && 'Calendar'[WeekNum]
                    = CurrentWeekNum - 1
            )
        )
)
    This Week Last Year = 
VAR CurrentWeekNum =
    MAX ( 'Calendar'[WeekNum] )
VAR CurrentYear =
    MAX ( 'Calendar'[Year] )
RETURN
    (
        CALCULATE (
            SUM ( Table1[Users] ),
            FILTER (
                ALL ( 'Calendar' ),
                'Calendar'[Year]
                    = CurrentYear - 1
                    && [WeekNum] = CurrentWeekNum
            )
        )
    )

    Drag two slicers for Year & WeekNum and a clustered bar chart into canvas.

     

    Best Regards,

    Herbert

    • jimbob741's avatar
      jimbob741
      Frequent Visitor
      10 years ago

      Thank you very much Herbert, much appreciated.

       

      Your solution seems to be exactly what im after, I will give it a go and let you know how I got on!

    • ElliotP's avatar
      ElliotP
      Icon for Post Prodigy rankPost Prodigy
      9 years ago

      v-haibl-msftAmazing Solution.

       

      I'm trying to use the same code; I have it working for my purpose except I can't seem to use my Datekey or a calculated column in my date table, I have to use the WeekNum value otherwise it doens't work; thoughts?