After selecting measurmenets A and B, switch panel from Query to Transform. If none were selected find and select “Field From Calculation”. You’ll see your measurements, you can select Calculation: Difference to plot A-B
After selecting measurmenets A and B, switch panel from Query to Transform. If none were selected find and select “Field From Calculation”. You’ll see your measurements, you can select Calculation: Difference to plot A-B