林业乳胶包中不同等级的合并

Question

我有以下示例。

\documentclass[a4paper,10pt]{report}
\usepackage[edges]{forest}
\begin{document}
\begin{forest}
        forked edges,
        /tikz/every pin edge/.append style={Latex-, shorten <=2.5pt, darkgray},
        /tikz/every pin/.append style={darkgray, font=\sffamily},
        /tikz/every label/.append style={darkgray, font=\sffamily},
        before typesetting nodes={
            delay={
                where content={}{coordinate}{},
            },
            where n children=0{tier=terminus, label/.process={Ow{content}{right:#1}}, content=}{},
        },
        for tree={
            grow'=0,
            s sep'+=10pt,
            l sep'+=25pt,
        },
        l sep'+=50pt,
        [, !l.edge label={coordinate [pos=0, pin=-135:common ancestor] }, !1.edge label={node [pos=.65, every label, above] {branch}}, !11.edge label={coordinate [pos=0, pin={[pin distance=30pt, align=center]135:single merger}]}
        [ [[6][[5][4]] ] [3]]
        [[2][1]]
        ]
\end{forest}
\end{document}

合并 {1,2} 和 {{3},{2,5,6}} 时可以有不同的位置吗？我现在正在阅读森林包的文档，但还没有找到任何线索来说明如何修改它。一个好的结果应该是这样的。

Answer 1

您可以创建一个自定义样式，分别移动当前级别的父锚点和下一级别的子锚点的坐标（但对于相对较大的连续移动，它可能无法正常工作）：

\documentclass[a4paper,10pt]{report}
\usepackage[edges]{forest}
\usetikzlibrary{arrows.meta}

\forestset{
}

\begin{document}
\begin{forest}
    forked edges,
    /tikz/every pin edge/.append style={Latex-, shorten <=2.5pt, darkgray},
    /tikz/every pin/.append style={darkgray, font=\sffamily},
    /tikz/every label/.append style={darkgray, font=\sffamily},
    before typesetting nodes={
        delay={
            where content={}{coordinate}{},
        },
        where n children=0{
            tier=terminus, 
            label/.process={Ow{content}{right:#1}}, 
            content={}
        }{},
    },
    for tree={
        grow'=0,
        s sep'+=10pt,
        l sep'+=25pt,
    },
    shift fork/.style={
        edge path={
            \noexpand\path[\forestoption{edge}]
            (!u.parent anchor) 
                -- ++(\forestoption{fork sep},0) 
                |- ([xshift={#1}].child anchor)
            \forestoption{edge label};
        },
        delay={
            for children={
                edge path={
                    \noexpand\path[\forestoption{edge}]
                    ([xshift={#1}]!u.parent anchor) 
                        -- ++(\forestoption{fork sep},0) 
                        |- (.child anchor)
                    \forestoption{edge label};
                },
            }
        }
    }, 
    [, !l.edge label={coordinate [pos=0, pin=-135:common ancestor]}, 
        !1.edge label={node [pos=.65, every label, above left] {branch}}, 
        !11.edge label={coordinate [pos=0, pin={
            [pin distance=30pt, align=center]135:single merger
        }]}
        [ 
            [, shift fork=15pt 
                [[6][7]]
                [, shift fork=-5pt [5][4]] 
            ] 
            [[3][3]]
        ]
        [, shift fork=-10pt [2][1]]
    ]
\end{forest}
\end{document}