How to generate scattered field for multiple angle of incidence ( or sum parametric sweep solutions)

Hi all,

i'm working on a scattering problem. I need to find the scattered field over a range of angle of incidence.
I know that i can plot the scattered field for each angle of incidence , but i want to plot the total field for all angle of incidence added together. So basically, i want to find out the total scattered field from multiple plane waves. I figured i could join the results for this parametric sweep, i could obtain the total scattered field, but i'm not sure how do to so in comsol, since i don't have a 2nd dataset. Your help is greatly appreciated!

thanks,

Yuchu