如何使边缘远离森林节点？

Question

\documentclass[convert={size=640}]{standalone}
\usepackage{forest}
\newcommand{\difference}{
\begin{tabular}{c|c|c|c|c}
  \hline
  0&1&0&1&\ldots\\
  \hline
\end{tabular}}
\newcommand{\differenceshort}{
\begin{tabular}{c|c|c}
  \hline
  0&1&\ldots\\
  \hline
\end{tabular}}
\begin{document}
\begin{forest}
  for tree={
    parent anchor=south,
    child anchor=north,
    inner sep=1pt
  }
  [\ldots,rotate=90,parent anchor=west,calign=child edge
  [\difference,node options={label=right:{\scriptsize Difference 3},
    label=left:{\scriptsize Layer 3}}
  [\differenceshort,node options={label=right:{\scriptsize Difference 1},
    label=left:{\scriptsize Layer 2}}
  [\differenceshort] [\differenceshort] [\ldots,base=top]]
  [\differenceshort,label=right:{\scriptsize Difference 2}
  [\differenceshort] [\differenceshort] [\ldots,label=right:{\scriptsize Inputs}]]]]
\end{forest}
\end{document}

最后一个终端节点和其父节点之间的边与它们的左兄弟节点相交。我如何以编程方式让这些边远离其他节点？

Answer 1

没有编程方法可以 100% 确保不发生冲突。请参阅文档了解原因。基本上，这样做成本太高了。但是，在这种情况下，情况可以得到很大改善。

在这种情况下，使用 Forest 的align选项而不是独立指定的tabulars 可以避免边与节点发生冲突，因为这会将 s 的顶部tabular与baselines 可以避免边与节点发生冲突，因为这会默认Sašo 的评论)：

\documentclass[tikz,multi,border=10pt]{standalone}
\usepackage{forest}
\begin{document}
\begin{forest}
  diff/.style={%
    align=c|c|c|c|c,
    delay={%
      content={%
        \hline
        0&1&0&1&\ldots\\
        \hline
      }
    }
  },
  diff short/.style={%
    align=c|c|c,
    delay={%
      content={%
        \hline
        0&1&\ldots\\
        \hline
      }
    }
  },
  for tree={
    parent anchor=south,
    child anchor=north,
    inner sep=1pt
  }
  [\ldots, rotate=90, parent anchor=west, calign=child edge
    [, diff, node options={label=right:{\scriptsize Difference 3}, label=left:{\scriptsize Layer 3}}
      [, diff short, node options={label=right:{\scriptsize Difference 1}, label=left:{\scriptsize Layer 2}}
        [, diff short]
        [, diff short]
        [\ldots]
      ]
      [, diff short, label=right:{\scriptsize Difference 2}
        [, diff short]
        [, diff short]
        [\ldots, label=right:{\scriptsize Inputs}]
      ]
    ]
  ]
\end{forest}
\end{document}

添加

for siblings={%
  anchor=center
},

diff short当他们有奇数个孩子时，将父母的边缘与他们的中间孩子的边缘对齐，我们得到

但也许最好的选择是添加

base=b 

对于树和

for siblings={%
  minimum size=1em,
},

和 的定义diff，diff short以确保在 之类的东西周围留出更多空间\ldots。这产生了

完整代码：

\documentclass[tikz,multi,border=10pt]{standalone}
\usepackage{forest}
\begin{document}
\begin{forest}
  diff/.style={%
    align=c|c|c|c|c,
    for siblings={%
      minimum size=1em,
    },
    delay={%
      content={%
        \hline
        0&1&0&1&\ldots\\
        \hline
      }
    }
  },
  diff short/.style={%
    align=c|c|c,
    for siblings={%
      minimum size=1em,
    },
    delay={%
      content={%
        \hline
        0&1&\ldots\\
        \hline
      }
    }
  },
  for tree={
    parent anchor=south,
    child anchor=north,
    base=b,
    inner sep=1pt,
    if={isodd(n_children())}{%
      tempcounta/.wrap pgfmath arg={#1}{int((n_children()+1)/2)},
      for n/.wrap pgfmath arg={{#1}{%
          calign with current edge
        }}{int((n_children()+1)/2)}
    }{}
  },
  [\ldots, rotate=90, parent anchor=west, calign=child edge
    [, diff, node options={label=right:{\scriptsize Difference 3}, label=left:{\scriptsize Layer 3}}
      [, diff short, node options={label=right:{\scriptsize Difference 1}, label=left:{\scriptsize Layer 2}}
        [, diff short]
        [, diff short]
        [\ldots]
      ]
      [, diff short, label=right:{\scriptsize Difference 2}
        [, diff short]
        [, diff short]
        [\ldots, label=right:{\scriptsize Inputs}]
      ]
    ]
  ]
\end{forest}
\end{document}