With the current implementation of RadPivotGrid
it is not possible to achieve the desired result.
At the bottom of the following help article you could see the available Aggregates:
On a side note, you could take a look at the RadPivotGrid's Custom Data Calculations
help article and see if you could implement any custom logic that could allow you to get the desired result.
DevCraft Q1'14 is here! Join the free online conference to see how this release solves your top-5 .NET challenges. Reserve your seat now!