R script visual and Filters in Power BI

I've been trying out some Power BI R integration samples. So far, everything works fine interms of Passing the dataset , getting the plots from R and displaying them in Power BI, Slicing the Visuals based on Related Filters in Power BI. 

Here's the Problem,

1. Is there a way to pass an unrelated value in the Dataset to R Script? 

  This Variable is used in a section of my R script (as an a parameter to a function but not to restrict the dataset)  and the user should have the ability to change it from the front end in Power BI.

Has anyone done this?