使用 graphviz 强制边缘上的方角

Question

我有以下.dot 文件。

digraph
{
    node [color=Limegreen,fontcolor=Limegreen,shape=oval]
    ilocus [label="iLocus"]
    gilocus [label="giLocus"]
    pilocus [label="piLocus"]
    nilocus [label="niLocus"]
    silocus [label="siLocus"]
    cilocus [label="ciLocus"]
    filocus [label="fiLocus"]
    iilocus [label="iiLocus"]

    node [color=Blue,fontcolor=Blue,shape=diamond]
    containgene [label="Contains gene(s)?"]
    proteincoding [label="Protein coding?"]
    multiplegenes [label="Multiple genes?"]
    geneflank [label="Flanked by genes\non both sides?"]

    ilocus -> containgene
    containgene:e -> geneflank [xlabel="No"]
    geneflank:e -> filocus [xlabel="No"]
    geneflank:w -> iilocus [xlabel="Yes"]
    containgene:w -> gilocus [xlabel="Yes"]
    gilocus -> proteincoding
    proteincoding:e -> nilocus [xlabel="No"]
    proteincoding:w -> pilocus [xlabel="Yes"]
    pilocus -> multiplegenes
    multiplegenes:e -> silocus [xlabel="No"]
    multiplegenes:w -> cilocus [xlabel="Yes"]
}

使用 graphviz 渲染我得到以下结果。

有什么方法可以强制边缘具有方角而不是圆角？文档中的splines=ortho 属性原则上似乎是为此设计的，但实际上，当我将graph [splines=ortho] 添加到我的有向图时，我只会得到直线。

我可以用graphviz在边缘上得到方角吗？类似于以下内容：

  ------ Multiple genes? -----
  |                          |
  | N                      Y |
  |                          |
  v                          V
siLocus                   ciLocus

Answer 1

也许你可以从使用splines=line开始

digraph
{
    splines=line
    ...

这会给你这个图表：

从那里您可能需要手动定位节点，或插入隐藏节点和边缘，例如

digraph
{
    splines=line

    node [color=Limegreen,fontcolor=Limegreen,shape=oval]
    ilocus [label="iLocus"]
    gilocus [label="giLocus"]
    pilocus [label="piLocus"]
    nilocus [label="niLocus"]
    silocus [label="siLocus"]
    cilocus [label="ciLocus"]
    filocus [label="fiLocus"]
    iilocus [label="iiLocus"]

    node [color=Blue,fontcolor=Blue,shape=diamond]
    containgene [label="Contains gene(s)?"]
    proteincoding [label="Protein coding?"]
    multiplegenes [label="Multiple genes?"]
    geneflank [label="Flanked by genes\non both sides?"]

    spacer1 [label="xxxx",style=invis]
    {rank=same gilocus spacer1 geneflank}
    gilocus -> spacer1 -> geneflank [style=invis]

    ilocus -> containgene
    containgene:e -> geneflank [xlabel="No"]
    geneflank:e -> filocus [xlabel="No"]
    geneflank:w -> iilocus [xlabel="Yes"]
    containgene:w -> gilocus [xlabel="Yes"]
    gilocus -> proteincoding
    proteincoding:e -> nilocus [xlabel="No"]
    proteincoding:w -> pilocus [xlabel="Yes"]
    pilocus -> multiplegenes
    multiplegenes:e -> silocus [xlabel="No"]
    multiplegenes:w -> cilocus [xlabel="Yes"]
}

产生

或者，您可以在顶部标签中插入空格以使较低的节点更好地排列：

digraph
{
    splines=line

    node [color=Limegreen,fontcolor=Limegreen,shape=oval]
    ilocus [label="iLocus"]
    gilocus [label="giLocus"]
    pilocus [label="piLocus"]
    nilocus [label="niLocus"]
    silocus [label="siLocus"]
    cilocus [label="ciLocus"]
    filocus [label="fiLocus"]
    iilocus [label="iiLocus"]

    node [color=Blue,fontcolor=Blue,shape=diamond]
    containgene [label="    Contains gene(s)?   "]
    proteincoding [label="Protein coding?"]
    multiplegenes [label="Multiple genes?"]
    geneflank [label="Flanked by genes\non both sides?"]

    ilocus -> containgene
    containgene:e -> geneflank [xlabel="No"]
    geneflank:e -> filocus [xlabel="No"]
    geneflank:w -> iilocus [xlabel="Yes"]
    containgene:w -> gilocus [xlabel="Yes"]
    gilocus -> proteincoding
    proteincoding:e -> nilocus [xlabel="No"]
    proteincoding:w -> pilocus [xlabel="Yes"]
    pilocus -> multiplegenes
    multiplegenes:e -> silocus [xlabel="No"]
    multiplegenes:w -> cilocus [xlabel="Yes"]
}

产生

Answer 2

您可以简单地使用splines=false (link to GraphvizFiddle)。