Displaying Individual values and Percentiles - Line Chart

[royces99]

I want to create a line chart that shows, on the x axis the Stage (4 stages) and shows the number of Findings on the y axis.  It needs to show the lines for individual Projects and the 80th Percentile line for the Projects selected.  I have created the DAX measure for the 80th Percentile and the data displays OK (and correctly calculated, code below) in a Matrix format but I cannot present the same information on a line chart.  I can only get the line chart to display an aggregate of the selected Projects and the Percentile line.  

Is there a way to do this?  Have tried creating a CombinedTable but that generates an error message "The expression refers to multiple columns. Multiple columns cannot be converted to a scalar value."

I'm stuck.  Please help!!

DAX for 80th Percentile: -

80th Perc 5 =

VAR CurrentLCStage = MAX('Findings raised by Project'[LC Stage])

RETURN

PERCENTILEX.INC(

    FILTER(

        ALLSELECTED('Findings raised by Project'),

        'Findings raised by Project'[LC Stage] = CurrentLCStage

    ),

    'Findings raised by Project'[Findings],

    0.8)

[royces99 · Accepted solution]

Yeah, I got the same level of help from Google.  For anybody else encountering this, I eventually found that changing the visual to a bar/ line combo chart worked with the individual Projects depicted as bars and the percentile values as lines (I also added 20th and Median in the same way).  

[Anonymous]

Hi @royces99 ,

The error message you're encountering, "The expression refers to multiple columns. Multiple columns cannot be converted to a scalar value," typically occurs when a DAX expression intended to return a single value instead references multiple columns. This can happen in scenarios where the context of the calculation isn't correctly defined for the visualization you're attempting to create.

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