interactions (feature request)

[asheetal]

In social and business sciences, the interactions are defined as between groups as opposed to intra-group interactions of features

For example grpA = c("A", "B", "C", "D".........."Z") grpB = c("p1", "p2", ......."p500")

I wanted to see the most important inter-group interaction of grpA and grpB. e.g. A:B interaction is useless to know, they could be Christianity:SouthernBaptist so not very interesting. Similarly p1:p2 interaction is useless to know, they could be Hispanic:African so not interesting

inter-group interaction such as A:p1 is interesting to know and could be Christianity:Hispanic

Any way I can achieve pairwise inter-group interaction in EIX?