y.field with multiple fields?

[walaj]

Looks like there is some code to check for y.field being length > 1 in "initialize". Should we maintain this? Looks like it just re-creates length(y.field) .Objects

[walaj]

This is also the case for a lot of arguments that allow for scalar or vector inputs (but not all). Propose to leave all the multi-track details to "c" and not support vector formatting inputs in the gTrack constructor, to avoid ambiguity and make more robust / simple.

[mskilab]

a vector y.field does replicate an object - this is tremendously useful syntax for quickly plotting many fields (eg covariates) from a single gRanges object.

aside from this feature I'm happy with restricting all the args to be scalar --> i.e. unless y.field is a vector. In all other cases use of c() is best

[walaj]

Ok perfect, that's what I was hoping. The y.field vector makes sense, but I was confused by the others. This is a good solution.