Graphviz 连接嵌套子图答案

【问题标题】：Graphviz connect nested subgraphsGraphviz 连接嵌套子图
【发布时间】：2021-10-29 19:51:56
【问题描述】：

问题

与这个问题（GraphViz - How to connect subgraphs?）类似，我想连接一些子图。只有这一次我需要连接嵌套的子图...... Graphviz 似乎对我的语法不满意。

来源

digraph G {
        compound=true

        subgraph cluster_family1 {
                graph [ label="Family1"; ]
                subgraph cluster_genus1 {
                        graph [ label="Genus1"; ]
                        species_1
                        species_2
                }
                subgraph cluster_genus2 {
                        graph [ label="Genus2"; ]
                        species_3
                        species_4
                }
        }
        subgraph cluster_family2 {
                graph [ label="Family2"; ]
                subgraph cluster_genus2 {
                        graph [ label="Genus3"; ]
                        species_5
                        species_6
                }
        }
        species_2 -> species_3 [ lhead=cluster_genus1 ] # TODO: Fix this line!!
}

生成的图表没有我希望的所需子图箭头。相反，我得到了错误：

dot -Tsvg source.dot -o output.svg
Warning: Two clusters named cluster_genus2 - the second will be ignored
Warning: species_2 -> species_3: head not inside head cluster cluster_genus1

【问题讨论】：

标签： syntax graphviz diagram dot

【解决方案1】：

两个错误：

重复的集群名称：(cluster_genus2)
混淆了你的优势的头尾

您可能需要其他调整，例如，如果您希望 species_1 在 species_2

之前

digraph G {
        compound=true

        subgraph cluster_family1 {
                graph [ label="Family1"; ]
                subgraph cluster_genus1 {
                        graph [ label="Genus1"; ]
                        species_1
                        species_2
                }
                subgraph cluster_genus2 {
                        graph [ label="Genus2"; ]
                        species_3
                        species_4
                }
        }
        subgraph cluster_family2 {
                graph [ label="Family2"; ]
                subgraph cluster_genus3 {  // fixed duplicate name
                        graph [ label="Genus3"; ]
                        species_5
                        species_6
                }
        }
        species_2 -> species_3 [ ltail=cluster_genus1 ] # changed head to tail??
}

捐赠：

【讨论】：