介绍Arrow(定向),强制定向图d3 [英] Introducing Arrow(directed), in Force Directed Graph d3
问题描述
我在此处的示例中使用了力导向图 - http://bl.ocks.org / mbostock / 4062045
但是由于我的数据是定向的,我需要图中的链接来表示为箭头连接。也许像是, http://bl.ocks.org/d3noob/5141278 。
有人可以建议创建有向图的变更或添加,如 http://bl.ocks.org/mbostock/4062045
我是D3的新手,我找不到
合并这两个例子很简单,我创建了一个< a href =http://jsfiddle.net/mdml/ncwuej9j/> JSFiddle to demo 。首先,将箭头样式的定义添加到SVG:
//创建箭头。
svg.append(svg:defs)。selectAll(marker)
.data([end])//不同的链接/路径类型可以在这里定义
。 enter()。append(svg:marker)//这部分添加箭头
.attr(id,String)
.attr(viewBox,0 -5 10 10 )
.attr(markWidth,6)
.attr(refX,15)
.attr(refY,-1.5) markHeight,6)
.attr(orient,auto)
.append(svg:path)
.attr(d,M0,-5L10, 0L0,5);
然后只需将标记添加到链接
.attr(marker-end,url(#end));
您最终得到的结果如下:
看到一些箭头比其他箭头大,因为不是所有的链接都有相同的 stroke-width
。如果你想让所有的箭头相同的大小,只需修改
.style(stroke-width ){return Math.sqrt(d.value);})
p>
I am using the force-directed graph in the sample here - http://bl.ocks.org/mbostock/4062045
But since my data is directed, I need the links in the graph to be represented as arrow connections. Maybe like in, http://bl.ocks.org/d3noob/5141278.
Can someone please suggest the alterations or additions that create a directed graph as in http://bl.ocks.org/mbostock/4062045
I am new to D3, and I couldn't find a solution, maybe its trivial, but a little help is appreciated.
Merging these two examples is straightforward, and I created a JSFiddle to demo. First, add the definition of the arrow style to the SVG:
// build the arrow.
svg.append("svg:defs").selectAll("marker")
.data(["end"]) // Different link/path types can be defined here
.enter().append("svg:marker") // This section adds in the arrows
.attr("id", String)
.attr("viewBox", "0 -5 10 10")
.attr("refX", 15)
.attr("refY", -1.5)
.attr("markerWidth", 6)
.attr("markerHeight", 6)
.attr("orient", "auto")
.append("svg:path")
.attr("d", "M0,-5L10,0L0,5");
Then just add the marker to your links
.attr("marker-end", "url(#end)");
You end up with something like this:
You'll see that some arrows are bigger than others, because not all links have the same stroke-width
. If you want to make all the arrows the same size, just modify
.style("stroke-width", function(d) { return Math.sqrt(d.value); })
when adding the links.
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