apspll = jsnx.allPairsShortestPathLength(PSNA.G)
for (i = 0; i < PSNA.G.numberOfNodes(); i++) {
  let node = PSNA.G.nodes()[i]
  let values = Array.from( apspl.get(node).values());
  let sum = math.sum(values)
  let closeness = math.divide(PSNA.G.numberOfNodes()-1,sum)
  console.log(closeness)
}