blocks|key|3194634|text|从点(1)开始：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3194635|len=f+sets+the+optimal+length+of+an+edge.++The+default+is+1.0.|code-block|syntax|javascript|3194636|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

From dot(1):

<pre><code>len=f sets the optimal length of an edge. The default is 1.0.
</code></pre>

blocks|key|1787452|text|我发现下面的属性'nodesep‘可以用sfdp解决这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1787453|https://www.graphviz.org/doc/info/attrs.html#a:nodesep|offset|length|1787454|对于dot以外的布局|style|CODE|1787455|1787456|节点影响单个节点上循环之间的间距，或一对节点之间的多边间距。|blockquote|1787457|1787458|1787459|注意，这是一个图形属性，因此该值对于图形中的所有边都是相同的。|1787460|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1I|0|0|2|3|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@$D|10|E|11|1|12]]|A|$]]|$1|F|3|G|5|6|7|13|8|@$D|14|E|15|H|I]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|16|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|17|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|18|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|19|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1A|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|S|$T|$5|U|V|W|A|$X|C]]]]

I found that the following attribute 'nodesep' worked to solve this problem with sfdp.
<a href="https://www.graphviz.org/doc/info/attrs.html#a:nodesep" rel="nofollow noreferrer">https://www.graphviz.org/doc/info/attrs.html#a:nodesep</a>
For layouts other than <code>dot</code>
<blockquote>
nodesep affects the spacing between loops on a single node, or multiedges between a pair of nodes.
</blockquote>
Note that this is a graph attribute, so the value is the same for all edges in the graph.

blocks|key|3106867|text|len不能在点模式下工作，但是你可以试试这个技巧：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3106868|digraph+G+{
rankdir=LR
a->b[dir=both]
b->c[dir=both,label="++++++++"]//+Just+use+the+space+to+increase+the+edge+length
}|code-block|syntax|javascript|3106869|如果为rankdir=TB，请使用label="\n"+(根据需要重复\n+)来增加长度。|3106870|​|3106871|📷|atomic|3106872|3106873|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/f265845742c482a10464a16ac1144246.svg|imageAlt^0|0|3|0|0|3|A|H|A|Z|2|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|11|8|@$9|12|A|13|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]|$9|1A|A|1B|B|C]]|D|@]|E|$]]|$1|M|3|N|5|6|7|1C|8|@]|D|@]|E|$]]|$1|O|3|P|5|Q|7|1D|8|@]|D|@$9|1E|A|1F|1|1G]]|E|$]]|$1|R|3|N|5|6|7|1H|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|1I|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z|10|-4]]]]

<code>len</code> doesn't works in dot, but you can try this trick:
<pre><code>digraph G {
rankdir=LR
a-&gt;b[dir=both]
b-&gt;c[dir=both,label=&quot; &quot;]// Just use the space to increase the edge length
}
</code></pre>
If <code>rankdir=TB</code>, use <code>label=&quot;\n&quot;</code> (repeat the <code>\n</code> as necessary) to increase the length.
<img src="https://www.plantuml.com/plantuml/svg/FOon2e0W54NtlkBINFG5jGRHr1eDJtse91PgK_JlbKHdkkSCLraTQ3VeSHPu2EHNPKCxJbcfxiJykjYIMN8ITIV_L3aIxDeI7-NID1YEc714HZACk9DyrWRhPM3wAYlDSEnrCldqkW40" alt="" />

blocks|key|3194791|text|可以通过在可见循环边之前添加一堆不可见的循环边来使循环边更长，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3194792|digraph+ER+{
++rankdir="LR";
++//orientation=landscape;
++++node+[shape=ellipse,+fontsize=30];
++{node+[label="Original"]+old;}
++{node+[label="Final"]+new;}
++{node+[label="Intermediate"]+ir;}

old+->+ir+[label="suggest",+fontsize=30];
ir+->+ir+[style="invis"]
ir+->+ir+[style="invis"]
ir+->+ir+[style="invis"]
ir+->+ir+[style="invis"]
ir+->+ir+[label="validate",+fontsize=30,+len=f];
ir+->+new+[label+=+"finalize",+fontsize=30];
}|code-block|syntax|javascript|3194793|​|3194794|📷|atomic|offset|length|3194795|3194796|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/75e18dac11c26cb29d8232020ea24cf2.png|imageAlt^0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Z|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|10|8|@]|9|@$L|11|M|12|1|13]]|A|$]]|$1|N|3|H|5|6|7|14|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V|W|-4]]]]

You can make the cyclic edge longer by adding a bunch of invisible cyclic edges before your visible one, like this:

<pre><code>digraph ER {
 rankdir="LR";
 //orientation=landscape;
 node [shape=ellipse, fontsize=30];
 {node [label="Original"] old;}
 {node [label="Final"] new;}
 {node [label="Intermediate"] ir;}

old -&gt; ir [label="suggest", fontsize=30];
ir -&gt; ir [style="invis"]
ir -&gt; ir [style="invis"]
ir -&gt; ir [style="invis"]
ir -&gt; ir [style="invis"]
ir -&gt; ir [label="validate", fontsize=30, len=f];
ir -&gt; new [label = "finalize", fontsize=30];
}
</code></pre>

<img src="https://i.stack.imgur.com/yoxiD.png" alt="OP&#39;s corrected graph">

blocks|key|3194856|text|编辑:对不起，我的答案会使边更长，但不是你需要的自引用边。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3194857|len不能在dot中工作，但minlen可以。|3194858|https://www.graphviz.org/doc/info/attrs.html#d:minlen|offset|length|3194859|x->y
[minlen=5]|code-block|syntax|javascript|3194860|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|1H|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@$F|W|G|X|1|Y]]|A|$]]|$1|H|3|I|5|J|7|Z|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|E]]]]

Edit: Sorry, my answer will make edges longer, but not the self referencing edges you need.

len doesn't work in dot, but minlen does.

<a href="https://www.graphviz.org/doc/info/attrs.html#d:minlen" rel="noreferrer">https://www.graphviz.org/doc/info/attrs.html#d:minlen</a>

<pre><code>x-&gt;y
[minlen=5]
</code></pre>

blocks|key|1470033|text|在.dot语言中，边连接了两个不同等级的音符。边的长度等于(等级差)*ranksep|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1470034|默认ranksep+(在图形属性中)为0.75英寸，因此相邻节点的边将为0.75英寸。|1470035|要减少边的长度，可以在图属性中将ranksep设置为较小的值|1470036|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

In .dot language, the edge connects two notes with different ranks.
The length of edge is equal to (difference in ranks)*ranksep
default ranksep (in graph attribute) is 0.75 inch, so edge of adjacent nodes will be 0.75 inch.
To reduce the edge length, you set ranksep into a smaller value in graph atrribute

blocks|key|3194932|text|我现在使用另一种方法来解决这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3194933|我使用graphviz将文件输出为点格式|3194934|dot+-T+dot+-Kneato+-o+./positioned.dot+./input.dot|code-block|syntax|javascript|3194935|该文件将包含每条边的Bezier曲线定义。我手动更改这些点，使其按照我想要的方式绘制曲线。|3194936|这一开始可能看起来有点吓人，但一旦你弄清楚了它们是如何工作的并不难，我正在慢慢地转向一个可以自动为我做这件事的脚本|3194937|然后重新运行dot，将编辑过的定位文件作为输入|3194938|dot+-T+png+-Kneato+-O+./positioned.dot|3194939|通过这种方法，我几乎把点变成了基于文本的visio替代品|3194940|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|W|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|Y|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

There's another approach that I now use for this:
I use graphviz to output the file in dot format
<pre><code>dot -T dot -Kneato -o ./positioned.dot ./input.dot
</code></pre>
This file will contain the Bezier curve definitions for every edge.
I manually change the points to curve the way I want it to draw.
This may look a little daunting at first but once you figure out, how they work this isn't hard, I'm inching towards a script that will do this for me automatically
then re-run dot with your edited positioned file as the input
<pre><code>dot -T png -Kneato -O ./positioned.dot

</code></pre>
With this approach I've pretty much turned dot into my text based visio replacement

In a directed graph, if there is a cycle, the graphviz makes that edge really short.

Is there a parameter that would let me change the length of the cyclic edge, so that 
the graph looks a bit uniform.

<pre><code>digraph ER {
 rankdir="LR";
 //orientation=landscape;
 node [shape=ellipse, fontsize=30];
 {node [label="Original"] old;}
 {node [label="Final"] new;}
 {node [label="Intermediate"] ir;}

old -&gt; ir [label="suggest", fontsize=30];
ir -&gt; ir [label="validate", fontsize=30, len=f];
ir -&gt; new [label = "finalize", fontsize=30];
}
</code></pre>

<img src="https://i.stack.imgur.com/4hWxO.png" alt="enter image description here">

How to specify the length of an edge in graphviz?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在有向图中，如果存在循环，则graphviz会使边变得非常短。有没有一个参数可以让我改变循环边的长度，使图形看起来有点均匀。digraph ER {  rankdir="LR";  //orientation=landscape;    node [shape=ellipse, fontsize=30];  {node...

问如何在graphviz中指定边的长度？
EN

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问如何在graphviz中指定边的长度？EN