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javascript - 从 csv 文件获取 D3 中的桑基图

转载 作者:行者123 更新时间:2023-11-28 01:44:42 26 4
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我正在尝试从 csv 文件创建 Sankey 图。我正在利用 timelyportfolio 提供的代码,以及 d3 站点的代码(甚至是示例 csv 文件)。然而,当我尝试在 Chrome 中运行代码时,我得到一个空白的 Html 页面,表明代码崩溃了。我尝试将源代码重定向到桌面上的文件,但仍然遇到相同的问题。 (我正在使用 Windows XP 的计算机上工作)

我已粘贴以下代码:

    <!DOCTYPE html>
<meta charset="utf-8">
<title>SANKEY Experiment</title>
<style>

.node rect {
cursor: move;
fill-opacity: .9;
shape-rendering: crispEdges;
}

.node text {
pointer-events: none;
text-shadow: 0 1px 0 #fff;
}

.link {
fill: none;
stroke: #000;
stroke-opacity: .2;
}

.link:hover {
stroke-opacity: .5;
}

</style>
<body>

<p id="chart">

<script src="http://d3js.org/d3.v3.js"></script>
<script src="C:\Documents and Settings\jennifer.ducz\Desktop\sankey.js"></script>
<script>

var units = "Units";

var margin = {top: 10, right: 10, bottom: 10, left: 10},
width = 1400 - margin.left - margin.right,
height = 740 - margin.top - margin.bottom;

var formatNumber = d3.format(",.0f"), // zero decimal places
format = function(d) { return formatNumber(d) + " " + units; },
color = d3.scale.category20();

// append the svg canvas to the page
var svg = d3.select("#chart").append("svg")
.attr("width", width + margin.left + margin.right)
.attr("height", height + margin.top + margin.bottom)
.append("g")
.attr("transform",
"translate(" + margin.left + "," + margin.top + ")");

// Set the sankey diagram properties
var sankey = d3.sankey()
.nodeWidth(36)
.nodePadding(10)
.size([width, height]);

var path = sankey.link();

// load the data with d3.csv instead of d3.json
//for another much simpler example uncomment the below
d3.csv("C:\Documents and Settings\jennifer.ducz\Desktop\sankey.csv", function(error, data) {
//d3.csv("d3noob_energy.csv", function(error, data) {
//set up graph in same style as original example but empty
graph = {"nodes" : [], "links" : []};

data.forEach(function (d) {
graph.nodes.push({ "name": d.source });
graph.nodes.push({ "name": d.target });

graph.links.push({ "source": d.source, "target": d.target, "value": +d.value });
});

//thanks Mike Bostock https://groups.google.com/d/msg/d3-js/pl297cFtIQk/Eso4q_eBu1IJ
//this handy little function returns only the distinct / unique nodes
graph.nodes = d3.keys(d3.nest()
.key(function (d) { return d.name; })
.map(graph.nodes));

//it appears d3 with force layout wants a numeric source and target
//so loop through each link replacing the text with its index from node
graph.links.forEach(function (d, i) {
graph.links[i].source = graph.nodes.indexOf(graph.links[i].source);
graph.links[i].target = graph.nodes.indexOf(graph.links[i].target);
});

//now loop through each nodes to make nodes an array of objects rather than an array of strings
graph.nodes.forEach(function (d, i) {
graph.nodes[i] = { "name": d };
});

sankey
.nodes(graph.nodes)
.links(graph.links)
.layout(32);

// add in the links
var link = svg.append("g").selectAll(".link")
.data(graph.links)
.enter().append("path")
.attr("class", "link")
.attr("d", path)
.style("stroke-width", function(d) { return Math.max(1, d.dy); })
.sort(function(a, b) { return b.dy - a.dy; });

// add the link titles
link.append("title")
.text(function(d) {
return d.source.name + " → " +
d.target.name + "\n" + format(d.value); });

// add in the nodes
var node = svg.append("g").selectAll(".node")
.data(graph.nodes)
.enter().append("g")
.attr("class", "node")
.attr("transform", function(d) {
return "translate(" + d.x + "," + d.y + ")"; })
.call(d3.behavior.drag()
.origin(function(d) { return d; })
.on("dragstart", function() {
this.parentNode.appendChild(this); })
.on("drag", dragmove));

// add the rectangles for the nodes
node.append("rect")
.attr("height", function(d) { return d.dy; })
.attr("width", sankey.nodeWidth())
.style("fill", function(d) {
return d.color = color(d.name.replace(/ .*/, "")); })
.style("stroke", function(d) {
return d3.rgb(d.color).darker(2); })
.append("title")
.text(function(d) {
return d.name + "\n" + format(d.value); });

// add in the title for the nodes
node.append("text")
.attr("x", -6)
.attr("y", function(d) { return d.dy / 2; })
.attr("dy", ".35em")
.attr("text-anchor", "end")
.attr("transform", null)
.text(function(d) { return d.name; })
.filter(function(d) { return d.x < width / 2; })
.attr("x", 6 + sankey.nodeWidth())
.attr("text-anchor", "start");

// the function for moving the nodes
function dragmove(d) {
d3.select(this).attr("transform",
"translate(" + (
d.x = Math.max(0, Math.min(width - d.dx, d3.event.x))
) + "," + (
d.y = Math.max(0, Math.min(height - d.dy, d3.event.y))
) + ")");
sankey.relayout();
link.attr("d", path);
}
});

</script>

</body>
</html>

如果有人可以告诉我我做错了什么,请告诉我。

编辑:这是我使用的示例数据,由 timelyportfolio 提供

source  target  value
Barry Elvis 2
Frodo Elvis 2
Frodo Sarah 2
Barry Alice 2
Elvis Sarah 2
Elvis Alice 2
Sarah Alice 4

最佳答案

我从来没有玩过它;然而,1)运行您的开发人员工具/控制台以准确查看哪一行导致应用程序崩溃

2)以下链接讨论格式化数据时的问题/解决方案

http://www.d3noob.org/2013/02/sankey-diagrams-description-of-d3js-code.html

关于javascript - 从 csv 文件获取 D3 中的桑基图,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20476471/

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