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我的问题是,当我下载数据时,我的 svg 的左上角总是有两个节点,而且我有很多错误提示“属性 y1 的无效值 y1="NaN"”(更像这样,但根据变量 x1、y1、y2)。如何让它正常工作?
我的js代码是:
<!DOCTYPE html>
<meta charset="utf-8">
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script>
<style>
.link {
fill: none;
stroke: #666;
stroke-width: 1.5px;
}
.node circle {
fill: #ccc;
stroke: #fff;
stroke-width: 1.5px;
}
text {
font: 10px sans-serif;
pointer-events: none;
}
</style>
<body>
<script>
var links = [];
var nodes = [];
var width = 960,
height = 500;
var svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
var force = d3.layout.force()
.nodes(d3.values(nodes))
.links(links)
.size([width, height])
.linkDistance(60)
.charge(-300)
.start();
var findNodeIndex = function(name) {
for (var i in nodes) {
if (nodes[i]["name"]==name){
return nodes[i];
}
};
};
$.get("/getAirportConnection?airportFrom=STN", function (data) { //this downloads data in JSON
data.forEach(function (link) {
link.source = nodes[link.airportFrom] || (nodes[link.airportFrom] = {name: link.airportFrom});
link.target = nodes[link.airportTo] || (nodes[link.airportTo] = {name: link.airportTo});
links.push({source: findNodeIndex(link.airportFrom), target: findNodeIndex(link.airportTo)}); // when I delete this line there is no links between nodes
});
var force = d3.layout.force()
.nodes(d3.values(nodes))
.links(links)
.size([width, height])
.linkDistance(60)
.charge(-300)
.on("tick", tick)
.start();
var link = svg.selectAll(".link")
.data(force.links())
.enter().append("line")
.attr("class", "link");
var node = svg.selectAll(".node")
.data(force.nodes())
.enter().append("g")
.attr("class", "node")
.call(force.drag);
node.append("circle")
.attr("r", 8);
node.append("text")
.attr("x", 12)
.attr("dy", ".35em")
.text(function(d) { return d.name; });
function tick() {
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 + ")"; });
}
});
</script>
</body>
我从服务器下载的JSON数据是这个:
[{"airportFrom":"STN","airportTo":"MXP"},{"airportFrom":"STN","airportTo":"CIY"},{"airportFrom":"STN","airportTo":"GNB"},{"airportFrom":"STN","airportTo":"RJK"},{"airportFrom":"STN","airportTo":"OSR"},{"airportFrom":"STN","airportTo":"TLL"},{"airportFrom":"STN","airportTo":"EFL"},{"airportFrom":"STN","airportTo":"SXB"},{"airportFrom":"STN","airportTo":"NUE"},{"airportFrom":"STN","airportTo":"AAR"},{"airportFrom":"STN","airportTo":"AGP"},{"airportFrom":"STN","airportTo":"AHO"},{"airportFrom":"STN","airportTo":"AOI"},{"airportFrom":"STN","airportTo":"BDS"},{"airportFrom":"STN","airportTo":"BGY"},{"airportFrom":"STN","airportTo":"BIQ"},{"airportFrom":"STN","airportTo":"BRE"},{"airportFrom":"STN","airportTo":"BRI"},{"airportFrom":"STN","airportTo":"BRQ"},{"airportFrom":"STN","airportTo":"BTS"},{"airportFrom":"STN","airportTo":"BZG"},{"airportFrom":"STN","airportTo":"CCF"},{"airportFrom":"STN","airportTo":"CIA"},{"airportFrom":"STN","airportTo":"DNR"},{"airportFrom":"STN","airportTo":"DUB"},{"airportFrom":"STN","airportTo":"EGC"},{"airportFrom":"STN","airportTo":"EIN"},{"airportFrom":"STN","airportTo":"FKB"},{"airportFrom":"STN","airportTo":"GDN"},{"airportFrom":"STN","airportTo":"GOA"},{"airportFrom":"STN","airportTo":"GRO"},{"airportFrom":"STN","airportTo":"GSE"},{"airportFrom":"STN","airportTo":"HAU"},{"airportFrom":"STN","airportTo":"HHN"},{"airportFrom":"STN","airportTo":"IBZ"},{"airportFrom":"STN","airportTo":"KIR"},{"airportFrom":"STN","airportTo":"KRK"},{"airportFrom":"STN","airportTo":"KTW"},{"airportFrom":"STN","airportTo":"KUN"},{"airportFrom":"STN","airportTo":"LCJ"},{"airportFrom":"STN","airportTo":"LEJ"},{"airportFrom":"STN","airportTo":"LDY"},{"airportFrom":"STN","airportTo":"LEI"},{"airportFrom":"STN","airportTo":"LIG"},{"airportFrom":"STN","airportTo":"LNZ"},{"airportFrom":"STN","airportTo":"LRH"},{"airportFrom":"STN","airportTo":"LUZ"},{"airportFrom":"STN","airportTo":"MAD"},{"airportFrom":"STN","airportTo":"MJV"},{"airportFrom":"STN","airportTo":"MLA"},{"airportFrom":"STN","airportTo":"MMX"},{"airportFrom":"STN","airportTo":"MRS"},{"airportFrom":"STN","airportTo":"NOC"},{"airportFrom":"STN","airportTo":"NRN"},{"airportFrom":"STN","airportTo":"NYO"},{"airportFrom":"STN","airportTo":"OPO"},{"airportFrom":"STN","airportTo":"ORK"},{"airportFrom":"STN","airportTo":"PEG"},{"airportFrom":"STN","airportTo":"PFO"},{"airportFrom":"STN","airportTo":"PGF"},{"airportFrom":"STN","airportTo":"PIS"},{"airportFrom":"STN","airportTo":"PMF"},{"airportFrom":"STN","airportTo":"POZ"},{"airportFrom":"STN","airportTo":"PSR"},{"airportFrom":"STN","airportTo":"PUY"},{"airportFrom":"STN","airportTo":"REU"},{"airportFrom":"STN","airportTo":"RDZ"},{"airportFrom":"STN","airportTo":"RIX"},{"airportFrom":"STN","airportTo":"RZE"},{"airportFrom":"STN","airportTo":"SCQ"},{"airportFrom":"STN","airportTo":"SDR"},{"airportFrom":"STN","airportTo":"SNN"},{"airportFrom":"STN","airportTo":"SVQ"},{"airportFrom":"STN","airportTo":"SXF"},{"airportFrom":"STN","airportTo":"SZG"},{"airportFrom":"STN","airportTo":"SZZ"},{"airportFrom":"STN","airportTo":"TFS"},{"airportFrom":"STN","airportTo":"TLN"},{"airportFrom":"STN","airportTo":"TMP"},{"airportFrom":"STN","airportTo":"TRF"},{"airportFrom":"STN","airportTo":"TRN"},{"airportFrom":"STN","airportTo":"TRS"},{"airportFrom":"STN","airportTo":"TUF"},{"airportFrom":"STN","airportTo":"VLC"},{"airportFrom":"STN","airportTo":"WRO"},{"airportFrom":"STN","airportTo":"XRY"},{"airportFrom":"STN","airportTo":"ZAZ"},{"airportFrom":"STN","airportTo":"VST"},{"airportFrom":"STN","airportTo":"ALC"},{"airportFrom":"STN","airportTo":"PMI"},{"airportFrom":"STN","airportTo":"BLL"},{"airportFrom":"STN","airportTo":"FAO"},{"airportFrom":"STN","airportTo":"BLQ"},{"airportFrom":"STN","airportTo":"FMM"},{"airportFrom":"STN","airportTo":"RYG"},{"airportFrom":"STN","airportTo":"ACE"},{"airportFrom":"STN","airportTo":"LPA"},{"airportFrom":"STN","airportTo":"FUE"},{"airportFrom":"STN","airportTo":"PDV"},{"airportFrom":"STN","airportTo":"LDE"},{"airportFrom":"STN","airportTo":"ZAD"},{"airportFrom":"STN","airportTo":"PMO"},{"airportFrom":"STN","airportTo":"SKG"},{"airportFrom":"STN","airportTo":"RHO"},{"airportFrom":"STN","airportTo":"SUF"},{"airportFrom":"STN","airportTo":"VNO"},{"airportFrom":"STN","airportTo":"CFU"},{"airportFrom":"STN","airportTo":"TSF"},{"airportFrom":"STN","airportTo":"BCN"},{"airportFrom":"STN","airportTo":"PSA"},{"airportFrom":"STN","airportTo":"FEZ"},{"airportFrom":"STN","airportTo":"RAK"},{"airportFrom":"STN","airportTo":"CHQ"},{"airportFrom":"STN","airportTo":"KGS"},{"airportFrom":"STN","airportTo":"BUD"},{"airportFrom":"STN","airportTo":"WMI"},{"airportFrom":"STN","airportTo":"MST"},{"airportFrom":"STN","airportTo":"RBA"},{"airportFrom":"STN","airportTo":"BOD"},{"airportFrom":"STN","airportTo":"LIS"},{"airportFrom":"STN","airportTo":"DTM"},{"airportFrom":"STN","airportTo":"BSL"},{"airportFrom":"STN","airportTo":"BVE"},{"airportFrom":"STN","airportTo":"OTP"},{"airportFrom":"STN","airportTo":"OSI"},{"airportFrom":"STN","airportTo":"TGD"},{"airportFrom":"STN","airportTo":"PRG"},{"airportFrom":"STN","airportTo":"SFT"},{"airportFrom":"STN","airportTo":"ATH"},{"airportFrom":"STN","airportTo":"CGN"}]
最佳答案
您正在设置不必要的属性,也不需要使用 findNodeIndex
函数——这就是问题所在。一些节点没有正确匹配。你可以简单地写
data.forEach(function (link) {
links.push({source: nodes[link.airportFrom] || (nodes[link.airportFrom] = {name: link.airportFrom}),
target: nodes[link.airportTo] || (nodes[link.airportTo] = {name: link.airportTo})});
});
完整示例 here .
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