flow_network: Create a tidygraph from flows and remove spurious edges in...
In ppintosilva/anprflows: Explore and Model ANPR Traffic Flows

Create a tidygraph from flows and remove spurious edges in the process.

flow_network(
  flows,
  spurious_if_below = c(rate_o = 0.1, rate_d = 0.1),
  label_subgraphs = TRUE,
  keep_levels = TRUE
)

`flows`	Asymptotic od flows
`spurious_if_below`	Remove edges whose attributes are lower than the corresponding threshold.
`label_subgraphs`	Whether to label subgraphs as a result of removing spurious edges.
`keep_levels`	Whether nodes should keep the same factor levels as flows.