我有这个 D3 力定向图，具有缩放和平移功能。问题是我是 d3.js 的新手，是否可以粗略计算每个节点的链接数？
我目前不知道如何解决这个问题，有没有简单的方法可以实现这一点？任何帮助/建议将不胜感激，谢谢。
var graph = { "nodes": [
{"id": "Myriel", "group": 1},
{"id": "Napoleon", "group": 1},
{"id": "Mlle.Baptistine", "group": 1},
{"id": "Mme.Magloire", "group": 1},
{"id": "CountessdeLo", "group": 1},
{"id": "Geborand", "group": 1},
{"id": "Champtercier", "group": 1},
{"id": "Cravatte", "group": 1},
{"id": "Count", "group": 1},
{"id": "OldMan", "group": 1},
{"id": "Labarre", "group": 2},
{"id": "Valjean", "group": 2},
{"id": "Marguerite", "group": 3},
{"id": "Mme.deR", "group": 2},
{"id": "Isabeau", "group": 2},
{"id": "Gervais", "group": 2},
{"id": "Tholomyes", "group": 3},
{"id": "Listolier", "group": 3},
{"id": "Fameuil", "group": 3},
{"id": "Blacheville", "group": 3},
{"id": "Favourite", "group": 3},
{"id": "Dahlia", "group": 3},
{"id": "Zephine", "group": 3},
{"id": "Fantine", "group": 3},
{"id": "Mme.Thenardier", "group": 4},
{"id": "Thenardier", "group": 4},
{"id": "Cosette", "group": 5},
{"id": "Javert", "group": 4},
{"id": "Fauchelevent", "group": 0},
{"id": "Bamatabois", "group": 2},
{"id": "Perpetue", "group": 3},
{"id": "Simplice", "group": 2},
{"id": "Scaufflaire", "group": 2},
{"id": "Woman1", "group": 2},
{"id": "Judge", "group": 2},
{"id": "Champmathieu", "group": 2},
{"id": "Brevet", "group": 2},
{"id": "Chenildieu", "group": 2},
{"id": "Cochepaille", "group": 2},
{"id": "Pontmercy", "group": 4},
{"id": "Boulatruelle", "group": 6},
{"id": "Eponine", "group": 4},
{"id": "Anzelma", "group": 4},
{"id": "Woman2", "group": 5},
{"id": "MotherInnocent", "group": 0},
{"id": "Gribier", "group": 0},
{"id": "Jondrette", "group": 7},
{"id": "Mme.Burgon", "group": 7},
{"id": "Gavroche", "group": 8},
{"id": "Gillenormand", "group": 5},
{"id": "Magnon", "group": 5},
{"id": "Mlle.Gillenormand", "group": 5},
{"id": "Mme.Pontmercy", "group": 5},
{"id": "Mlle.Vaubois", "group": 5},
{"id": "Lt.Gillenormand", "group": 5},
{"id": "Marius", "group": 8},
{"id": "BaronessT", "group": 5},
{"id": "Mabeuf", "group": 8},
{"id": "Enjolras", "group": 8},
{"id": "Combeferre", "group": 8},
{"id": "Prouvaire", "group": 8},
{"id": "Feuilly", "group": 8},
{"id": "Courfeyrac", "group": 8},
{"id": "Bahorel", "group": 8},
{"id": "Bossuet", "group": 8},
{"id": "Joly", "group": 8},
{"id": "Grantaire", "group": 8},
{"id": "MotherPlutarch", "group": 9},
{"id": "Gueulemer", "group": 4},
{"id": "Babet", "group": 4},
{"id": "Claquesous", "group": 4},
{"id": "Montparnasse", "group": 4},
{"id": "Toussaint", "group": 5},
{"id": "Child1", "group": 10},
{"id": "Child2", "group": 10},
{"id": "Brujon", "group": 4},
{"id": "Mme.Hucheloup", "group": 8}
],
"links": [
{"source": "Napoleon", "target": "Myriel", "value": 1, "type":"A"},
{"source": "Mlle.Baptistine", "target": "Myriel", "value": 8, "type":"A"},
{"source": "Mme.Magloire", "target": "Myriel", "value": 10, "type":"A"},
{"source": "Mme.Magloire", "target": "Mlle.Baptistine", "value": 6, "type":"A"},
{"source": "CountessdeLo", "target": "Myriel", "value": 1, "type":"A"},
{"source": "Geborand", "target": "Myriel", "value": 1, "type":"A"},
{"source": "Champtercier", "target": "Myriel", "value": 1, "type":"A"},
{"source": "Cravatte", "target": "Myriel", "value": 1, "type":"A"},
{"source": "Count", "target": "Myriel", "value": 2, "type":"A"},
{"source": "OldMan", "target": "Myriel", "value": 1, "type":"A"},
{"source": "Valjean", "target": "Labarre", "value": 1, "type":"A"},
{"source": "Valjean", "target": "Mme.Magloire", "value": 3, "type":"A"},
{"source": "Valjean", "target": "Mlle.Baptistine", "value": 3, "type":"A"},
{"source": "Valjean", "target": "Myriel", "value": 5, "type":"A"},
{"source": "Marguerite", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Mme.deR", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Isabeau", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Gervais", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Listolier", "target": "Tholomyes", "value": 4, "type":"A"},
{"source": "Fameuil", "target": "Tholomyes", "value": 4, "type":"A"},
{"source": "Fameuil", "target": "Listolier", "value": 4, "type":"A"},
{"source": "Blacheville", "target": "Tholomyes", "value": 4, "type":"A"},
{"source": "Blacheville", "target": "Listolier", "value": 4, "type":"A"},
{"source": "Blacheville", "target": "Fameuil", "value": 4, "type":"A"},
{"source": "Favourite", "target": "Tholomyes", "value": 3, "type":"A"},
{"source": "Favourite", "target": "Listolier", "value": 3, "type":"A"},
{"source": "Favourite", "target": "Fameuil", "value": 3, "type":"A"},
{"source": "Favourite", "target": "Blacheville", "value": 4, "type":"A"},
{"source": "Dahlia", "target": "Tholomyes", "value": 3, "type":"A"},
{"source": "Dahlia", "target": "Listolier", "value": 3, "type":"A"},
{"source": "Dahlia", "target": "Fameuil", "value": 3, "type":"A"},
{"source": "Dahlia", "target": "Blacheville", "value": 3, "type":"A"},
{"source": "Dahlia", "target": "Favourite", "value": 5, "type":"A"},
{"source": "Zephine", "target": "Tholomyes", "value": 3, "type":"A"},
{"source": "Zephine", "target": "Listolier", "value": 3, "type":"A"},
{"source": "Zephine", "target": "Fameuil", "value": 3, "type":"A"},
{"source": "Zephine", "target": "Blacheville", "value": 3, "type":"A"},
{"source": "Zephine", "target": "Favourite", "value": 4, "type":"A"},
{"source": "Zephine", "target": "Dahlia", "value": 4, "type":"A"},
{"source": "Fantine", "target": "Tholomyes", "value": 3, "type":"A"},
{"source": "Fantine", "target": "Listolier", "value": 3, "type":"A"},
{"source": "Fantine", "target": "Fameuil", "value": 3, "type":"A"},
{"source": "Fantine", "target": "Blacheville", "value": 3, "type":"A"},
{"source": "Fantine", "target": "Favourite", "value": 4, "type":"A"},
{"source": "Fantine", "target": "Dahlia", "value": 4, "type":"A"},
{"source": "Fantine", "target": "Zephine", "value": 4, "type":"A"},
{"source": "Fantine", "target": "Marguerite", "value": 2, "type":"A"},
{"source": "Fantine", "target": "Valjean", "value": 9, "type":"A"},
{"source": "Mme.Thenardier", "target": "Fantine", "value": 2, "type":"A"},
{"source": "Mme.Thenardier", "target": "Valjean", "value": 7, "type":"A"},
{"source": "Thenardier", "target": "Mme.Thenardier", "value": 13, "type":"A"},
{"source": "Thenardier", "target": "Fantine", "value": 1, "type":"A"},
{"source": "Thenardier", "target": "Valjean", "value": 12, "type":"A"},
{"source": "Cosette", "target": "Mme.Thenardier", "value": 4, "type":"A"},
{"source": "Cosette", "target": "Valjean", "value": 31, "type":"A"},
{"source": "Cosette", "target": "Tholomyes", "value": 1, "type":"A"},
{"source": "Cosette", "target": "Thenardier", "value": 1, "type":"A"},
{"source": "Javert", "target": "Valjean", "value": 17, "type":"A"},
{"source": "Javert", "target": "Fantine", "value": 5, "type":"A"},
{"source": "Javert", "target": "Thenardier", "value": 5, "type":"A"},
{"source": "Javert", "target": "Mme.Thenardier", "value": 1, "type":"A"},
{"source": "Javert", "target": "Cosette", "value": 1, "type":"A"},
{"source": "Fauchelevent", "target": "Valjean", "value": 8, "type":"A"},
{"source": "Fauchelevent", "target": "Javert", "value": 1, "type":"A"},
{"source": "Bamatabois", "target": "Fantine", "value": 1, "type":"A"},
{"source": "Bamatabois", "target": "Javert", "value": 1, "type":"A"},
{"source": "Bamatabois", "target": "Valjean", "value": 2, "type":"A"},
{"source": "Perpetue", "target": "Fantine", "value": 1, "type":"A"},
{"source": "Simplice", "target": "Perpetue", "value": 2, "type":"A"},
{"source": "Simplice", "target": "Valjean", "value": 3, "type":"A"},
{"source": "Simplice", "target": "Fantine", "value": 2, "type":"A"},
{"source": "Simplice", "target": "Javert", "value": 1, "type":"A"},
{"source": "Scaufflaire", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Woman1", "target": "Valjean", "value": 2, "type":"A"},
{"source": "Woman1", "target": "Javert", "value": 1, "type":"A"},
{"source": "Judge", "target": "Valjean", "value": 3, "type":"A"},
{"source": "Judge", "target": "Bamatabois", "value": 2, "type":"A"},
{"source": "Champmathieu", "target": "Valjean", "value": 3, "type":"A"},
{"source": "Champmathieu", "target": "Judge", "value": 3, "type":"A"},
{"source": "Champmathieu", "target": "Bamatabois", "value": 2, "type":"A"},
{"source": "Brevet", "target": "Judge", "value": 2, "type":"A"},
{"source": "Brevet", "target": "Champmathieu", "value": 2, "type":"A"},
{"source": "Brevet", "target": "Valjean", "value": 2, "type":"A"},
{"source": "Brevet", "target": "Bamatabois", "value": 1, "type":"A"},
{"source": "Chenildieu", "target": "Judge", "value": 2, "type":"A"},
{"source": "Chenildieu", "target": "Champmathieu", "value": 2, "type":"A"},
{"source": "Chenildieu", "target": "Brevet", "value": 2, "type":"A"},
{"source": "Chenildieu", "target": "Valjean", "value": 2, "type":"A"},
{"source": "Chenildieu", "target": "Bamatabois", "value": 1, "type":"A"},
{"source": "Cochepaille", "target": "Judge", "value": 2, "type":"A"},
{"source": "Cochepaille", "target": "Champmathieu", "value": 2, "type":"A"},
{"source": "Cochepaille", "target": "Brevet", "value": 2, "type":"A"},
{"source": "Cochepaille", "target": "Chenildieu", "value": 2, "type":"A"},
{"source": "Cochepaille", "target": "Valjean", "value": 2, "type":"A"},
{"source": "Cochepaille", "target": "Bamatabois", "value": 1, "type":"A"},
{"source": "Pontmercy", "target": "Thenardier", "value": 1, "type":"A"},
{"source": "Boulatruelle", "target": "Thenardier", "value": 1, "type":"A"},
{"source": "Eponine", "target": "Mme.Thenardier", "value": 2, "type":"A"},
{"source": "Eponine", "target": "Thenardier", "value": 3, "type":"A"},
{"source": "Anzelma", "target": "Eponine", "value": 2, "type":"A"},
{"source": "Anzelma", "target": "Thenardier", "value": 2, "type":"A"},
{"source": "Anzelma", "target": "Mme.Thenardier", "value": 1, "type":"A"},
{"source": "Woman2", "target": "Valjean", "value": 3, "type":"A"},
{"source": "Woman2", "target": "Cosette", "value": 1, "type":"A"},
{"source": "Woman2", "target": "Javert", "value": 1, "type":"A"},
{"source": "MotherInnocent", "target": "Fauchelevent", "value": 3, "type":"A"},
{"source": "MotherInnocent", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Gribier", "target": "Fauchelevent", "value": 2, "type":"A"},
{"source": "Mme.Burgon", "target": "Jondrette", "value": 1, "type":"A"},
{"source": "Gavroche", "target": "Mme.Burgon", "value": 2, "type":"A"},
{"source": "Gavroche", "target": "Thenardier", "value": 1, "type":"A"},
{"source": "Gavroche", "target": "Javert", "value": 1, "type":"A"},
{"source": "Gavroche", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Gillenormand", "target": "Cosette", "value": 3, "type":"A"},
{"source": "Gillenormand", "target": "Valjean", "value": 2, "type":"A"},
{"source": "Magnon", "target": "Gillenormand", "value": 1, "type":"A"},
{"source": "Magnon", "target": "Mme.Thenardier", "value": 1, "type":"A"},
{"source": "Mlle.Gillenormand", "target": "Gillenormand", "value": 9, "type":"A"},
{"source": "Mlle.Gillenormand", "target": "Cosette", "value": 2, "type":"A"},
{"source": "Mlle.Gillenormand", "target": "Valjean", "value": 2, "type":"A"},
{"source": "Mme.Pontmercy", "target": "Mlle.Gillenormand", "value": 1, "type":"A"},
{"source": "Mme.Pontmercy", "target": "Pontmercy", "value": 1, "type":"A"},
{"source": "Mlle.Vaubois", "target": "Mlle.Gillenormand", "value": 1, "type":"A"},
{"source": "Lt.Gillenormand", "target": "Mlle.Gillenormand", "value": 2, "type":"A"},
{"source": "Lt.Gillenormand", "target": "Gillenormand", "value": 1, "type":"A"},
{"source": "Lt.Gillenormand", "target": "Cosette", "value": 1, "type":"A"},
{"source": "Marius", "target": "Mlle.Gillenormand", "value": 6, "type":"A"},
{"source": "Marius", "target": "Gillenormand", "value": 12, "type":"A"},
{"source": "Marius", "target": "Pontmercy", "value": 1, "type":"A"},
{"source": "Marius", "target": "Lt.Gillenormand", "value": 1, "type":"A"},
{"source": "Marius", "target": "Cosette", "value": 21, "type":"A"},
{"source": "Marius", "target": "Valjean", "value": 19, "type":"A"},
{"source": "Marius", "target": "Tholomyes", "value": 1, "type":"A"},
{"source": "Marius", "target": "Thenardier", "value": 2, "type":"A"},
{"source": "Marius", "target": "Eponine", "value": 5, "type":"A"},
{"source": "Marius", "target": "Gavroche", "value": 4, "type":"A"},
{"source": "BaronessT", "target": "Gillenormand", "value": 1, "type":"A"},
{"source": "BaronessT", "target": "Marius", "value": 1, "type":"A"},
{"source": "Mabeuf", "target": "Marius", "value": 1, "type":"A"},
{"source": "Mabeuf", "target": "Eponine", "value": 1, "type":"A"},
{"source": "Mabeuf", "target": "Gavroche", "value": 1, "type":"A"},
{"source": "Enjolras", "target": "Marius", "value": 7, "type":"A"},
{"source": "Enjolras", "target": "Gavroche", "value": 7, "type":"A"},
{"source": "Enjolras", "target": "Javert", "value": 6, "type":"A"},
{"source": "Enjolras", "target": "Mabeuf", "value": 1, "type":"A"},
{"source": "Enjolras", "target": "Valjean", "value": 4, "type":"A"},
{"source": "Combeferre", "target": "Enjolras", "value": 15, "type":"A"},
{"source": "Combeferre", "target": "Marius", "value": 5, "type":"A"},
{"source": "Combeferre", "target": "Gavroche", "value": 6, "type":"A"},
{"source": "Combeferre", "target": "Mabeuf", "value": 2, "type":"A"},
{"source": "Prouvaire", "target": "Gavroche", "value": 1, "type":"A"},
{"source": "Prouvaire", "target": "Enjolras", "value": 4, "type":"A"},
{"source": "Prouvaire", "target": "Combeferre", "value": 2, "type":"A"},
{"source": "Feuilly", "target": "Gavroche", "value": 2, "type":"A"},
{"source": "Feuilly", "target": "Enjolras", "value": 6, "type":"A"},
{"source": "Feuilly", "target": "Prouvaire", "value": 2, "type":"A"},
{"source": "Feuilly", "target": "Combeferre", "value": 5, "type":"A"},
{"source": "Feuilly", "target": "Mabeuf", "value": 1, "type":"A"},
{"source": "Feuilly", "target": "Marius", "value": 1, "type":"A"},
{"source": "Courfeyrac", "target": "Marius", "value": 9, "type":"A"},
{"source": "Courfeyrac", "target": "Enjolras", "value": 17, "type":"A"},
{"source": "Courfeyrac", "target": "Combeferre", "value": 13, "type":"A"},
{"source": "Courfeyrac", "target": "Gavroche", "value": 7, "type":"A"},
{"source": "Courfeyrac", "target": "Mabeuf", "value": 2, "type":"A"},
{"source": "Courfeyrac", "target": "Eponine", "value": 1, "type":"A"},
{"source": "Courfeyrac", "target": "Feuilly", "value": 6, "type":"A"},
{"source": "Courfeyrac", "target": "Prouvaire", "value": 3, "type":"A"},
{"source": "Bahorel", "target": "Combeferre", "value": 5, "type":"A"},
{"source": "Bahorel", "target": "Gavroche", "value": 5, "type":"A"},
{"source": "Bahorel", "target": "Courfeyrac", "value": 6, "type":"A"},
{"source": "Bahorel", "target": "Mabeuf", "value": 2, "type":"A"},
{"source": "Bahorel", "target": "Enjolras", "value": 4, "type":"A"},
{"source": "Bahorel", "target": "Feuilly", "value": 3, "type":"A"},
{"source": "Bahorel", "target": "Prouvaire", "value": 2, "type":"A"},
{"source": "Bahorel", "target": "Marius", "value": 1, "type":"A"},
{"source": "Bossuet", "target": "Marius", "value": 5, "type":"A"},
{"source": "Bossuet", "target": "Courfeyrac", "value": 12, "type":"A"},
{"source": "Bossuet", "target": "Gavroche", "value": 5, "type":"A"},
{"source": "Bossuet", "target": "Bahorel", "value": 4, "type":"A"},
{"source": "Bossuet", "target": "Enjolras", "value": 10, "type":"A"},
{"source": "Bossuet", "target": "Feuilly", "value": 6, "type":"A"},
{"source": "Bossuet", "target": "Prouvaire", "value": 2, "type":"A"},
{"source": "Bossuet", "target": "Combeferre", "value": 9, "type":"A"},
{"source": "Bossuet", "target": "Mabeuf", "value": 1, "type":"A"},
{"source": "Bossuet", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Joly", "target": "Bahorel", "value": 5, "type":"A"},
{"source": "Joly", "target": "Bossuet", "value": 7, "type":"A"},
{"source": "Joly", "target": "Gavroche", "value": 3, "type":"A"},
{"source": "Joly", "target": "Courfeyrac", "value": 5, "type":"A"},
{"source": "Joly", "target": "Enjolras", "value": 5, "type":"A"},
{"source": "Joly", "target": "Feuilly", "value": 5, "type":"A"},
{"source": "Joly", "target": "Prouvaire", "value": 2, "type":"A"},
{"source": "Joly", "target": "Combeferre", "value": 5, "type":"A"},
{"source": "Joly", "target": "Mabeuf", "value": 1, "type":"A"},
{"source": "Joly", "target": "Marius", "value": 2, "type":"A"},
{"source": "Grantaire", "target": "Bossuet", "value": 3, "type":"A"},
{"source": "Grantaire", "target": "Enjolras", "value": 3, "type":"A"},
{"source": "Grantaire", "target": "Combeferre", "value": 1, "type":"A"},
{"source": "Grantaire", "target": "Courfeyrac", "value": 2, "type":"A"},
{"source": "Grantaire", "target": "Joly", "value": 2, "type":"A"},
{"source": "Grantaire", "target": "Gavroche", "value": 1 , "type":"A"},
{"source": "Grantaire", "target": "Bahorel", "value": 1, "type":"A"},
{"source": "Grantaire", "target": "Feuilly", "value": 1, "type":"A"},
{"source": "Grantaire", "target": "Prouvaire", "value": 1, "type":"A"},
{"source": "MotherPlutarch", "target": "Mabeuf", "value": 3, "type":"A"},
{"source": "Gueulemer", "target": "Thenardier", "value": 5, "type":"A"},
{"source": "Gueulemer", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Gueulemer", "target": "Mme.Thenardier", "value": 1, "type":"A"},
{"source": "Gueulemer", "target": "Javert", "value": 1, "type":"A"},
{"source": "Gueulemer", "target": "Gavroche", "value": 1, "type":"A"},
{"source": "Gueulemer", "target": "Eponine", "value": 1, "type":"A"},
{"source": "Babet", "target": "Thenardier", "value": 6, "type":"A"},
{"source": "Babet", "target": "Gueulemer", "value": 6, "type":"A"},
{"source": "Babet", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Babet", "target": "Mme.Thenardier", "value": 1, "type":"A"},
{"source": "Babet", "target": "Javert", "value": 2, "type":"A"},
{"source": "Babet", "target": "Gavroche", "value": 1, "type":"A"},
{"source": "Babet", "target": "Eponine", "value": 1, "type":"A"},
{"source": "Claquesous", "target": "Thenardier", "value": 4, "type":"A"},
{"source": "Claquesous", "target": "Babet", "value": 4, "type":"A"},
{"source": "Claquesous", "target": "Gueulemer", "value": 4, "type":"A"},
{"source": "Claquesous", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Claquesous", "target": "Mme.Thenardier", "value": 1, "type":"A"},
{"source": "Claquesous", "target": "Javert", "value": 1, "type":"A"},
{"source": "Claquesous", "target": "Eponine", "value": 1, "type":"A"},
{"source": "Claquesous", "target": "Enjolras", "value": 1, "type":"A"},
{"source": "Montparnasse", "target": "Javert", "value": 1, "type":"A"},
{"source": "Montparnasse", "target": "Babet", "value": 2, "type":"A"},
{"source": "Montparnasse", "target": "Gueulemer", "value": 2, "type":"A"},
{"source": "Montparnasse", "target": "Claquesous", "value": 2, "type":"A"},
{"source": "Montparnasse", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Montparnasse", "target": "Gavroche", "value": 1, "type":"A"},
{"source": "Montparnasse", "target": "Eponine", "value": 1, "type":"A"},
{"source": "Montparnasse", "target": "Thenardier", "value": 1, "type":"A"},
{"source": "Toussaint", "target": "Cosette", "value": 2, "type":"A"},
{"source": "Toussaint", "target": "Javert", "value": 1, "type":"A"},
{"source": "Toussaint", "target": "Valjean", "value": 1, "type":"A"},
{"source": "Child1", "target": "Gavroche", "value": 2, "type":"A"},
{"source": "Child2", "target": "Gavroche", "value": 2, "type":"A"},
{"source": "Child2", "target": "Child1", "value": 3, "type":"A"},
{"source": "Brujon", "target": "Babet", "value": 3, "type":"A"},
{"source": "Brujon", "target": "Gueulemer", "value": 3, "type":"A"},
{"source": "Brujon", "target": "Thenardier", "value": 3, "type":"A"},
{"source": "Brujon", "target": "Gavroche", "value": 1, "type":"A"},
{"source": "Brujon", "target": "Eponine", "value": 1, "type":"A"},
{"source": "Brujon", "target": "Claquesous", "value": 1, "type":"A"},
{"source": "Brujon", "target": "Montparnasse", "value": 1, "type":"A"},
{"source": "Mme.Hucheloup", "target": "Bossuet", "value": 1, "type":"A"},
{"source": "Mme.Hucheloup", "target": "Joly", "value": 1, "type":"A"},
{"source": "Mme.Hucheloup", "target": "Grantaire", "value": 1, "type":"A"},
{"source": "Mme.Hucheloup", "target": "Bahorel", "value": 1, "type":"A"},
{"source": "Mme.Hucheloup", "target": "Courfeyrac", "value": 1, "type":"A"},
{"source": "Mme.Hucheloup", "target": "Gavroche", "value": 1, "type":"A"},
{"source": "Mme.Hucheloup", "target": "Enjolras", "value": 1, "type":"A"}
]
};
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var color = d3.scaleOrdinal(d3.schemeCategory20);
var zoom_handler = d3.zoom().on("zoom", zoom_actions);
// zoom_handler(svg);
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().distance(300).id(function(d) {
return d.id;
}))
.force("charge", d3.forceManyBody().strength(-300))
.force("center", d3.forceCenter(width / 2, height / 2));
var g = svg.append("g")
.attr("class", "everything");
svg.call(zoom_handler)
.call(zoom_handler.transform, d3.zoomIdentity.translate(200, 150).scale(0.2));
var link = g.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line")
.attr("stroke-width", function(d) { return Math.sqrt(d.value); });
var node = g.append("g")
.attr("class", "nodes")
.selectAll("g")
.data(graph.nodes)
.enter().append("g")
var circles = node.append("circle")
.attr("r", 8)
.attr("fill", function(d) { return color(d.group); })
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
var lables = node.append("text") // Labeling for nodes
.text(function(d) {
return d.id;
})
.attr('x', 6)
.attr('y', 3);
node.append("title")
.text(function(d) { return d.id; });
simulation
.nodes(graph.nodes)
.on("tick", ticked);
simulation.force("link")
.links(graph.links);
function ticked() {
link
.attr("x1", function(d) { return d.source.x; })
.attr("y1", function(d) { return d.source.y; })
.attr("x2", function(d) { return d.target.x; })
.attr("y2", function(d) { return d.target.y; });
node
.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")";
})
};
function zoom_actions(){
g.attr("transform", d3.event.transform)
}
function dragstarted(d) {
if (!d3.event.active) simulation.alphaTarget(0.3).restart();
d.fx = d.x;
d.fy = d.y;
}
function dragged(d) {
d.fx = d3.event.x;
d.fy = d3.event.y;
}
function dragended(d) {
if (!d3.event.active) simulation.alphaTarget(0);
d.fx = null;
d.fy = null;
}.links line {
stroke: #999;
stroke-opacity: 0.6;
}
.nodes circle {
stroke: #000;
stroke-width: 1.5px;
}
text {
font-family: "Lucida Sans Unicode", "Lucida Grande", sans-serif;
font-size: 10px;
}<!DOCTYPE html>
<meta charset="utf-8">
<link rel="shortcut icon" href="//#" />
<html>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
</html>
</div>
<svg width="798" height="400"></svg>
</div>
<script src="https://d3js.org/d3.v4.min.js"></script>最佳答案
您可以计算每个节点的权重并找到连接数最多的节点，如下所示。
function findLargest() {
var largest = null,
weight = 0;
node.each(function(d) {
var connections = link.filter(function(l) {
return l.source.index == d.index || l.target.index == d.index
});
d.weight = connections.size();
if (d.weight > weight) {
largest = {
node: this,
links: connections
};
weight = d.weight;
}
});
if (largest) {
d3.select(largest.node).select("circle")
.style("fill", "red")
.style("stroke-width", 3);
largest.links.each(function() {
d3.select(this).style("stroke", "red").style("stroke-width", 3);;
})
}
}
您可以引用here缩放到该特定节点位置。
关于javascript - D3 Force Graph 找到最多节点连接，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/51510269/