calculate measure as an individual deviance from average

[jonasr]

Hi all,

I am trying to calculate new measure as a deviation of individual ratio from the overall average ratio across all individuals. It will be displayed in a bar chart and the number of rows will depend on some other attribute slicers so it needs to be a measure so that it can change dynamically.

Example data:

Person | home_p
xxx       | 1
xxx       | 0
xxx       | 1
xxx       | 0
xxx       | 1
yyy       | 1
yyy       | 1
yyy       | 1
yyy       | 1
yyy       | 1
aaa       | 1
aaa       | 1
aaa       | 1
bbb       | 0
bbb       | 0
bbb       | 0

The first part is simple

home_p_rate = SUM('score'[home_p])/COUNT('score'[home_p])

which gives me the individual ratios in the bar chart.

Now I need to add something like this to get the deviance from overall average:

home_p_rate_dev = SUM('score'[home_p])/COUNT('score'[home_p]) - AverageAcrossAllIndividuals( SUM('score'[home_p])/COUNT('score'[home_p]) )

Any idea how to approach this?

Thanks

Jonas 

[v-haibl-msft · Accepted solution]

@jonasr

In this scenario, you can use below measure formula to get the deviance from overall average.

home_p_rate_dev = 
VAR AverageAcrossAllIndividuals =
    CALCULATE ( AVERAGE ( score[home_p] ), ALL ( score ) )
RETURN
( [home_p_rate] - AverageAcrossAllIndividuals )

Best Regards,

Herbert

[jonasr]

Very simple and nice solution. Thank you!