How to add looped edge?

[RylanSchaeffer]

I would like to have an edge that loops from one node to itself to show a temporal dependence. Using \edge {b_t} {b_t} ; does not work. Is there a workaround?

[fcostin]

i am unsure if there is a correct way to declare a self-loop edge with tikz-bayesnet, but it is possible to add one via \path:

see https://tex.stackexchange.com/questions/35423/changing-loop-size-and-shape-in-tikz