Remove igraph singlet nodes
Details
This function is a lightweight method to remove igraph nodes with
no connections. In fact, the min_degree can be used to require
a minimum number of connections, but the intended use is to remove
the singlet nodes that have no connections.
See also
Other jam igraph layouts:
layout_with_qfr(),
layout_with_qfrf(),
relayout_with_qfr(),
reorderIgraphNodes(),
rotate_igraph_layout(),
spread_igraph_labels()