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私はD3ライブラリ（v4）を初めて使用しました。いくつかの強制直接レイアウトを作成する必要があります。 コードの再利用[https://bl.ocks.org/mbostock/4062045][1]私はいくつかの矩形のノードと内部のテキストでテストを構築しました。実際にはいくつかのリンクを持つ13のノードがあります。ただし、「ノード0」のリンクが描かれていても、レイアウトには12ノード（「ノード1」から「ノード12」まで）が表示されます。 console.log（）がノードオブジェクトとテキストラベルを正しくリストしている間は、DOMは12と12のみを表示します。誰かが私に以下のコードで間違っていることを説明してください。この行でD3 v4 missing node
var graph = { "nodes":
[{"id":"Node 0","group":2},{"id":"Node 1","group":2},
{"id":"Node 2","group":2},{"id":"Node 3","group":2},
{"id":"Node 4","group":2},{"id":"Node 5","group":2},
{"id":"Node 6","group":2},{"id":"Node 7","group":2},
{"id":"Node 8","group":2},{"id":"Node 9","group":2},
{"id":"Node 10","group":2},{"id":"Node 11","group":2},
{"id":"Node 12","group":4}],
"links":
[{"source":"Node 0","target":"Node 1","value":"5"},
{"source":"Node 1","target":"Node 5","value":"5"},
{"source":"Node 2","target":"Node 1","value":"5"},
{"source":"Node 3","target":"Node 2","value":"5"},
{"source":"Node 3","target":"Node 1","value":"5"},
{"source":"Node 3","target":"Node 5","value":"5"},
{"source":"Node 4","target":"Node 3","value":"5"},
{"source":"Node 4","target":"Node 8","value":"5"},
{"source":"Node 5","target":"Node 8","value":"5"},
{"source":"Node 6","target":"Node 9","value":"5"},
{"source":"Node 7","target":"Node 3","value":"5"},
{"source":"Node 8","target":"Node 10","value":"5"},
{"source":"Node 9","target":"Node 10","value":"5"},
{"source":"Node 9","target":"Node 7","value":"5"},
{"source":"Node 10","target":"Node 12","value":"20"},
{"source":"Node 11","target":"Node 7","value":"5"}]
};
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var color = d3.scaleOrdinal(d3.schemeCategory20).domain(d3.range(1,20));;
var simulation = d3.forceSimulation()
.force("link", d3.forceLink().id(function(d) { return d.id; }).distance(100))
.force("charge", d3.forceManyBody())
.force("center", d3.forceCenter(width/2, height/2));
var link = svg.append("g")
.attr("class", "links")
.selectAll("line")
.data(graph.links)
.enter().append("line")
.attr("stroke-width", function(d) { return Math.sqrt(d.value); });
var nodes = svg.selectAll("g")
.data(graph.nodes)
.enter()
.append("g");
nodes.append("rect")
.attr("class", "nodes")
.attr("width", 70)
.attr("height", 20)
.attr("fill", function(d) { return color(d.group); })
.call(d3.drag()
.on("start", dragstarted)
.on("drag", dragged)
.on("end", dragended));
nodes.append("text")
.attr("class", "labels")
.attr("dy", "1.5em")
.attr("dx", "1.5em")
.attr("text-anchor", "start")
.text(function(d) { return d.id; });
nodes.selectAll('rect')
.attr("width", function(d) {return this.parentNode.getBBox().width+10;})
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; });
nodes.attr("transform", function(d) { return "translate(" + d.x + "," + d.y + ")"; });
}
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;
}