Using measures and filters to show two sets of data on a Power BI Radar Chart

10/05/18

The Power BI Radar Chart is a nice way to show how a set of values varies across multiple categories. And you can add further sets - so one radar chart shows two or more sets of values against the spokes. You then see at a glance how the different sets of values compare.

I used the radar chart to compare ‘predicted’ and ‘actual’ attainment levels in different subjects for school students. The table of sample data is shown below. The attainment levels are in one column and the type - ‘Predicted’ or ‘Actual’ is in another column. I’m interested in the average predicted and the average actual attainment level for each subject category.

sample attainment data

Getting the two types of attainment level to appear as two different plots on the radar chart is straightforward. I created two measures:

predictions measure

actuals measure

The two measures, ‘Actuals’ and ‘Predictions’, are then used on the Y Axis within the Fields section of the Visualizations panel. The ‘Category’ field is set to ‘Subjects’. Here is the resulting radar chart:

sample enrolment data

The measures are simple - a good introduction to anyone who wants to start to do more with Power BI.