Understand the output of Heinz

graph G {
    overlap=scale
    layout=neato
    2 [label="K10213\n3.13773\n0\n2"]
    9 [label="K01488\n2.03864\n0\n9"]
    19 [label="K04765\n1.26814\n0\n19"]
    46 [label="K05851\n0.52899\n0\n46"]
    56 [label="K01510\n0.196619\n0\n56"]
    86 [label="K11751\n-0.0996626\n0\n86",shape=box]
    label="Total weight: 7.07046"
    9 -- 2
    2 -- 86
    9 -- 86
    19 -- 46
    56 -- 19
    19 -- 86
    56 -- 46
    56 -- 86
}

A minor question, what does 0 stand for in, for example, [label="K10213\n3.13773\n0\n2"]? 0 has appeared in this label.

ls-cwi / heinz

Understand the output of Heinz #15