我想使用Javascript绘制Sankey diagram。任何人都可以就可用的算法或库提供一些指导吗？
答案 0 :(得分：11)
这是使用raphaeljs
的基本Sankey图表function Sankey(x0, y0, height, losses) {
var initialcolor = Raphael.getColor();
var start = x0 + 200;
var level = y0 + height;
var heightunit = height / 100;
var remaining = 100 * heightunit;
function drawloss(start, level, loss) {
var thecolor = Raphael.getColor();
paper.path("M" + (start - 100) + "," + (level - loss) + "L" + start + "," + (level - loss)).attr({stroke: thecolor});
paper.path("M" + (start - 100) + "," + level + "L" + start + "," + level).attr({stroke: thecolor});
paper.path("M " + start + "," + level + " Q" + (start + 100) + "," + level + " " + (start + 100) + "," + (level + 100)).attr({stroke: thecolor});
paper.path("M " + start + "," + (level - loss) + " Q" + (start + 100 + loss) + "," + (level - loss) + " " + (start + 100 + loss) + "," + (level + 100)).attr({stroke: thecolor});
paper.path("M " + (start + 100) + "," + (level + 100) + " L " + (start - 10 + 100) + "," + (level + 100) + " L " + (start + loss / 2 + 100) + "," + (level + 110) + " L " + (start + loss + 10 + 100) + "," + (level + 100) + " L " + (start + loss + 100) + ", " + (level + 100)).attr({stroke: thecolor});
}
function drawremaining(start, level, loss) {
paper.path("M 100," + y0 + "L" + (start + 100) + "," + y0).attr({stroke: initialcolor});
paper.path("M" + (start - 100) + "," + level + "L" + (start + 100) + "," + level).attr({stroke: initialcolor});
paper.path("M " + (start + 100) + " " + y0 + " L " + (start + 100) + " " + (y0 - 10) + " L " + (start + 110) + " " + (y0 + loss / 2) + " L " + (start + 100) + " " + (level + 10) + " L " + (start + 100) + " " + level).attr({stroke: initialcolor});
}
function drawstart(x0, y0, width, height) {
paper.path("M " + x0 + "," + y0 + "L" + (x0 + width) + "," + y0).attr({stroke: initialcolor});
paper.path("M " + x0 + "," + (y0 + height) + "L" + (x0 + width) + "," + y0 + height)).attr({stroke: initialcolor});
paper.path("M " + x0 + "," + y0 + "L" + x0 + "," + (y0 + height)).attr({stroke: initialcolor});
}
drawstart(x0, y0, 100, height);
for (var i in losses) {
drawloss(start, level, losses[i] * heightunit);
remaining -= losses[i] * heightunit;
level -= losses[i] * heightunit;
start += 100;
}
}
我这样使用它：
<div id="notepad" style="height:1000px; width:1000px; background: #eee"></div>
<script type="text/javascript">
var paper = Raphael(document.getElementById("notepad"), 1020, 1000);
var losses=[50, 30, 5];
Sankey(10, 100, 200, losses);
</script>
答案 1 :(得分：9)
答案 2 :(得分：6)
D3.js使用插件很好地创建了sankey图。
答案 3 :(得分：2)
以下是Mike Bostock基于D3的Sankey DIagram代码如何工作的相当详细的解释：http://www.d3noob.org/2013/02/sankey-diagrams-description-of-d3js-code.html
我已经在基于Grails的应用服务器上实现了它，并且它可以工作。
答案 4 :(得分：2)
Google Charts包含Sankey图表：https://developers.google.com/chart/interactive/docs/gallery/sankey
答案 5 :(得分：1)
感谢zenify在路径上启动我，我不得不重新调整上面的一些复制代码才能使它工作，但它确实提供了一个很好的起点。下面的代码可以复制到.htm文件中，您只需要在同一目录中安装raphael-min.js即可。
问候/ Colm
<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" class="JS">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<title>Raphael makes Sankey</title>
<script type="text/javascript" src="raphael-min.js"></script>
<script type="text/javascript">
function Sankey(x0,y0,height,losses){
initialcolor= Raphael.getColor();
var start=x0+200;
var level=y0+height;
var heightunit=height/100;
var remaining=100*heightunit;
function drawloss(start,level,loss){
var thecolor=Raphael.getColor();
paper.path("M"+(start-100)+","+(level-loss)+"L"+start+","+(level-loss)).attr({stroke: thecolor});
paper.path("M"+(start-100)+","+(level)+"L"+start+","+(level)).attr({stroke: thecolor});
paper.path("M "+start+","+level+" Q"+(start+100)+","+level+" "+(start+100)+","+(level+100)).attr({stroke: thecolor});
paper.path("M "+start+","+(level-loss)+" Q"+(start+100+loss)+","+(level-loss)+" "+(start+100+loss)+","+(level+100)).attr({stroke: thecolor});
paper.path("M "+(start+100)+","+(level+100)+" L "+(start-10+100)+","+(level+100)+" L "+(start+(loss/2)+100)+","+(level+110)+" L "+(start+(loss)+10+100)+","+(level+100)+" L "+(start+(loss)+100)+", "+(level+100)).attr({stroke: thecolor});
}
function drawremaining(start,level,loss){
paper.path("M 100,"+y0+"L"+(start+100)+","+y0).attr({stroke: initialcolor});
paper.path("M"+(start-100)+","+(level)+"L"+(start+100)+","+(level)).attr({stroke: initialcolor});
paper.path("M "+(start+100)+" "+y0+" L "+(start+100)+" "+(y0-10)+" L "+(start+110)+" "+(y0+(loss/2))+" L "+(start+100)+" "+(level+10)+" L "+(start+100)+" "+(level)).attr({stroke: initialcolor});
}
function drawstart(x0, y0, width, height){
paper.path("M "+x0+","+y0+"L"+(x0+width)+","+y0+"").attr({stroke: initialcolor});
paper.path("M "+x0+","+(y0+height)+"L"+(x0+width)+","+y0+height+"").attr({stroke: initialcolor});
paper.path("M "+x0+","+y0+"L"+x0+","+(y0+height)+"").attr({stroke: initialcolor});
}
drawstart(x0,y0,100,height);
for (var i in losses){
drawloss(start,level,losses[i]*heightunit);
remaining-=losses[i]*heightunit;
level-=losses[i]*heightunit;
start+=100;
}
drawremaining(start, level, remaining);
}
</script>
</head>
<body id="blog">
<div id="notepad" style="height:1000px; width:1000px; background: #eee"></div>
<script type="text/javascript">
var paper = Raphael(document.getElementById("notepad"), 1020, 1000);
var losses=[50, 30, 5];
Sankey(10, 100, 200, losses);
</script>
</body>
</html>
答案 6 :(得分：1)
更新2020：
对于那些努力使D3 Sankey示例栩栩如生的人，我找到了这个超级简单的视频教程。对我来说就像是一种魅力：）
https://reactviz.holiday/sankey/
另外，如果您也无法使它正常工作， react-google-charts 有一个非常漂亮的选择，使用起来再容易不过了（至少实现了该示例只是从这里https://react-google-charts.com/sankey-diagram复制粘贴整个组件：
import Chart from "react-google-charts";
<Chart
width={600}
height={'300px'}
chartType="Sankey"
loader={<div>Loading Chart</div>}
data={[
['From', 'To', 'Weight'],
['A', 'X', 5],
['A', 'Y', 7],
['A', 'Z', 6],
['B', 'X', 2],
['B', 'Y', 9],
['B', 'Z', 4],
]}
rootProps={{ 'data-testid': '1' }}
/>