Vector version of `TVShift`?

[dom-linkevicius]

TVShift can be used to shift <:Real values, but there doesn't seem to be a Vector{<:Real} analog to it. Are there any specific reasons why this does not exist or just that no one's gotten to doing it? If there are no major reasons why this does not exist, I'd take a crack at it as I'd need it for something I'm working on.

[tpapp]

I think we should spend a bit of time discussing the API first.

Do you want to shift vectors by vectors (in which case we can just make it accept vector arguments), or vectors by scalars?

What would you combine it with?

[dom-linkevicius]

I'd like the transform to shift a vector, say x=[x1; x2; x3], by another vector, say z=[z1; z2; z3]. I think shifting a vector x by a scalar c I'd view as an instance of the first case, where z=[c; c; c].

[dom-linkevicius]

@tpapp I've a local branch that addresses this (and a bit more) and I'd like to open a PR

[tpapp]

@dom-linkevicius: please do