Create time lagged spatial weightsSource:
a weights lists created from a spacetime object's geometry context.
a time-lagged spatial neighbors list created by
the number of time slices
the number of locations
It is intended that
spt_wt() is used following the use of
using the same input arguments. This ensures that the time-lagged spatial
weights are correctly associated with the time-lagged spatial neighbors.
spt_nb() for creating spacetime neighbors which are inputs into spacetime weights