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森林，改变`s sep`使得它在每个第二个端节点都更大？

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森林，改变`s sep`使得它在每个第二个端节点都更大？

以下 MWE 生成了forest我想要的树形图（使用包）：

\documentclass[border=3mm]{standalone}
\usepackage{forest}

\begin{document}
\tikzset{ELS/.style={% Edge Label Style
      font=\footnotesize, inner sep=2pt,
      anchor=south #1, % label position: "ELS=west" or "EL=east"
      pos=0.6}
        }
\newcommand\EL{edge label}
    \begin{forest}
for tree={
    draw, semithick,
    parent anchor=children,
  l sep=13 mm,
  s sep= 1 mm,
    anchor=parent,% <--- work around alignment issue
        },
   EL/.style = {
   before typesetting nodes={%% <--- work around edge labels positioning
    where n=1{%
      edge label/.wrap value={node[ELS=east]{$#1$}}
    }{%
      edge label/.wrap value={node[ELS=west]{$#1$}}
    }
                            }
                }
[Start
    [A, EL=\leq 0.5
        [A1, EL=\leq 0.3
            [A11, EL=\leq 0.7]
            [A12, EL=\geq 0.7]
        ]
        [,phantom,fit=band] % <---
        [A2, EL=\geq 0.3
            [A21, EL=\leq 0.7]
            [A22, EL=\geq 0.7]
         ]
    ]
    [,phantom,fit=band]     % <---
    [B, EL=\geq 0.5
        [B1, EL=\leq 0.3
            [B11, EL=\leq 0.7]
            [B12, EL=\geq 0.7]
        ]
        [,phantom,fit=band] % <---
        [B2, EL=\geq 0.3
            [B11, EL=\leq 0.7]
            [B12, EL=\geq 0.7]
        ]
    ]
]
    \end{forest}
\end{document}

在此处输入图片描述

我想知道，是否有可能在不插入幻像节点的情况下获得相同的结果？此外，我将不胜感激对我的 MWE 代码的任何改进。

附录：一种方法是手动插入，s sep如下面的代码所示：

[Start,s sep=4mm
    [A, EL=\leq 0.5,s sep=4mm 
        [A1, EL=\leq 0.3,s sep=1mm
            [A11, EL=\leq 0.7]
            [A12, EL=\geq 0.7]
        ]
        [A2, EL=\geq 0.3,s sep=1mm 
            [A21, EL=\leq 0.7]
            [A22, EL=\geq 0.7]
         ]
    ]
    [B, EL=\geq 0.5,s sep=4mm 
        [B1, EL=\leq 0.3,s sep=1mm
            [B11, EL=\leq 0.7]
            [B12, EL=\geq 0.7]
        ]
        [B2, EL=\geq 0.3,s sep=1mm
            [B11, EL=\leq 0.7]
            [B12, EL=\geq 0.7]
        ]
    ]
]

考虑到上述解决方案，现在的问题是：是否可以在fortree序言中编写一个代码，它将取代那些手动插入的代码s sep=...？

答案1

是的。使用s sep+。

\documentclass[border=3mm]{standalone}
\usepackage{forest}

\begin{document}
\tikzset{ELS/.style={% Edge Label Style
      font=\footnotesize, inner sep=2pt,
      anchor=south #1, % label position: "ELS=west" or "EL=east"
      pos=0.6}
        }
\newcommand\EL{edge label}
    \begin{forest}
for tree={
    draw, semithick,
    parent anchor=children,
  l sep=13 mm,
  s sep+=2mm,
    anchor=parent,% <--- work around alignment issue
        },
   EL/.style = {
   before typesetting nodes={%% <--- work around edge labels positioning
    where n=1{%
      edge label/.wrap value={node[ELS=east]{$#1$}}
    }{%
      edge label/.wrap value={node[ELS=west]{$#1$}}
    }
                            }
                }
[Start
    [A, EL=\leq 0.5
        [A1, EL=\leq 0.3,s sep+=-3mm
            [A11, EL=\leq 0.7]
            [A12, EL=\geq 0.7]
        ]
        %[,phantom,fit=band] % <---
        [A2, EL=\geq 0.3,s sep+=-3mm
            [A21, EL=\leq 0.7]
            [A22, EL=\geq 0.7]
         ]
    ]
    %[,phantom,fit=band]     % <---
    [B, EL=\geq 0.5
        [B1, EL=\leq 0.3,s sep+=-3mm
            [B11, EL=\leq 0.7]
            [B12, EL=\geq 0.7]
        ]
        %[,phantom,fit=band] % <---
        [B2, EL=\geq 0.3,s sep+=-3mm
            [B11, EL=\leq 0.7]
            [B12, EL=\geq 0.7]
        ]
    ]
]
    \end{forest}
\end{document}

在此处输入图片描述

在 Zarko 给我发信息之前，我的电脑上就有这个。（我认为没有必要为它添加更新。）

\documentclass[border=3mm]{standalone}
\usepackage{forest}

\begin{document}
\tikzset{ELS/.style={% Edge Label Style
      font=\footnotesize, inner sep=2pt,
      anchor=south #1, % label position: "ELS=west" or "EL=east"
      pos=0.6}
        }
\newcommand\EL{edge label}
    \begin{forest}
for tree={
    draw, semithick,
    parent anchor=children,
    s sep=4mm,
  l sep=13 mm,
    anchor=parent,% <--- work around alignment issue
        },
   EL/.style = {
   before typesetting nodes={%% <--- work around edge labels positioning
    where n=1{%
      edge label/.wrap value={node[ELS=east]{$#1$}}
    }{%
      edge label/.wrap value={node[ELS=west]{$#1$}}
    },
    where level=2{s sep+=-1mm}{s sep+=0.5mm}
                            }
                }
[Start
    [A, EL=\leq 0.5
        [A1, EL=\leq 0.3
            [A11, EL=\leq 0.7]
            [A12, EL=\geq 0.7]
        ]
        %[,phantom,fit=band] % <---
        [A2, EL=\geq 0.3
            [A21, EL=\leq 0.7]
            [A22, EL=\geq 0.7]
         ]
    ]
    %[,phantom,fit=band]     % <---
    [B, EL=\geq 0.5
        [B1, EL=\leq 0.3
            [B11, EL=\leq 0.7]
            [B12, EL=\geq 0.7]
        ]
        %[,phantom,fit=band] % <---
        [B2, EL=\geq 0.3
            [B11, EL=\leq 0.7]
            [B12, EL=\geq 0.7]
        ]
    ]
]
    \end{forest}
\end{document}

在此处输入图片描述

答案2

仅供记录。在 @marmot 的精彩回答的帮助下，在 forest反复阅读文档后，我找到了我所寻找的解决方案：

\documentclass[border=3mm, preview]{standalone}
\usepackage{forest}

\begin{document}
\tikzset{ELS/.style={% Edge Label Style
      font=\footnotesize\sffamily, inner sep=2pt,
      anchor=south #1, % label position: "ELS=west" or "ELS=east"
      pos=0.6}
        }
    \begin{forest}
for tree={
    draw,
    semithick,
%    fill=orange!20,
    parent anchor=children,
  l sep=13 mm,
  s sep=4mm,
    where level=2{s sep=1mm}{}
        },
   EL/.style = {
   before typesetting nodes={%
    where n=1{%
      edge label/.wrap value={node[ELS=east]{$#1$}}
    }{%
      edge label/.wrap value={node[ELS=west]{$#1$}}
    }
                            }
                }
[Start
    [A, EL=\leq 0.5
        [A1, EL=\leq 0.3
            [A11, EL=\leq 0.7]
            [A12, EL=\geq 0.7]
        ]
        [A2, EL=\geq 0.3
            [A21, EL=\leq 0.7]
            [A22, EL=\geq 0.7]
         ]
    ]
    [B, EL=\geq 0.5
        [B1, EL=\leq 0.3
            [B11, EL=\leq 0.7]
            [B12, EL=\geq 0.7]
        ]
        [B2, EL=\geq 0.3
            [B11, EL=\leq 0.7]
            [B12, EL=\geq 0.7]
        ]
    ]
]    \end{forest}
\end{document}

得到期望的结果：

在此处输入图片描述

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