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决策树中的重叠节点

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决策树中的重叠节点

我有以下决策树这个例子稍作修改。当我向第二个右侧节点添加两个子节点时，内部左侧节点和内部右侧节点已经重叠。我该如何分离这些节点？

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{positioning}
\newdimen\nodeDist
\nodeDist=35mm
\begin{document}

\begin{tikzpicture}[
    node/.style={%
      draw,
      rectangle,
    },
  ]

    \node [node] (A) {SimilarityScore1};
    \path (A) ++(-135:\nodeDist) node [node] (B){loooooongeteeext};
    \path (A) ++(-45:\nodeDist) node [node] (C) {loooooongeteeext};
    \path (C) ++(-135:\nodeDist) node [node] (D) {loooooongeteeext};
    \path (C) ++(-45:\nodeDist) node [node] (E) {loooooongeteeext};
       \path (B) ++(-135:\nodeDist) node [node] (F) {loooooongeteeext};
    \path (B) ++(-45:\nodeDist) node [node] (G) {loooooongeteeext};

    \draw (A) -- (B) node [left,pos=0.25] {$<= 0.904712$}(A);
    \draw (A) -- (C) node [right,pos=0.25] {$> 0.904712$}(A);
    \draw (C) -- (D) node [left,pos=0.25] {$<= 0.896089$}(A);
    \draw (C) -- (E) node [right,pos=0.20] {$> 0.896089$}(A);
    \draw (B) -- (F) node [left,pos=0.2] {$<= 0.997372$}(A);
    \draw (B) -- (G) node [right,pos=0.20] {$> 0.997372$}(A);
\end{tikzpicture}

\end{document}

提前致谢

答案1

您必须更改连接器的长度或角度。或者两者兼而有之，这里有一个建议，可以同时实现我认为合理的目标：

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{positioning}
\newdimen\nodeDist
\nodeDist=25mm
\newdimen\nodeDistUpper
\nodeDistUpper=40mm
\begin{document}

\begin{tikzpicture}[
    node/.style={%
      draw,
      rectangle,
    },
  ]

    \node [node] (A) {SimilarityScore1};
    \path (A) ++(-157.5:\nodeDistUpper) node [node] (B){loooooongeteeext};
    \path (A) ++(-22.5:\nodeDistUpper) node [node] (C) {loooooongeteeext};
    \path (C) ++(-135:\nodeDist) node [node] (D) {loooooongeteeext};
    \path (C) ++(-45:\nodeDist) node [node] (E) {loooooongeteeext};
    \path (B) ++(-135:\nodeDist) node [node] (F) {loooooongeteeext};
    \path (B) ++(-45:\nodeDist) node [node] (G) {loooooongeteeext};

    \draw (A) -- (B) node [left,pos=0.25] {$\leq 0.904712$}(A);
    \draw (A) -- (C) node [right,pos=0.25] {$> 0.904712$}(A);
    \draw (C) -- (D) node [left,pos=0.25] {$\geq 0.896089$}(A);
    \draw (C) -- (E) node [right,pos=0.20] {$> 0.896089$}(A);
    \draw (B) -- (F) node [left,pos=0.2] {$\leq 0.997372$}(A);
    \draw (B) -- (G) node [right,pos=0.20] {$> 0.997372$}(A);
\end{tikzpicture}

\end{document}

在此处输入图片描述

答案2

另一种不同的方法。由于您的图表是树形（决策）图，因此可以借助forest包轻松绘制：

\documentclass[border=5mm]{standalone}
\usepackage{forest}

\begin{document}
\forestset{EL/.style 2 args={edge label={%
    node[midway, font=\footnotesize, 
         inner sep=2pt, anchor=south #1]{$#2$}},
                     },
        }% end of forestset

\begin{forest}
for tree={
  draw,
  l sep=17 mm,
  s sep= 1 mm,
        }% end of for tree
[SimilarityScore1
    [loooooongeteeext, EL={east}{\leq 0.904712},
        [loooooongeteeext,EL={east}{\leq 0.896089}]
        [loooooongeteeext,EL={west}{\geq 0.896089}]
    ]
    [loooooongeteeext, EL={west}{\geq 0.904712}
        [loooooongeteeext,EL={east}{\leq 0.896089}]
        [loooooongeteeext,EL={west}{\geq 0.896089}]
    ]
]
\end{forest}
\end{document}

在此处输入图片描述

附录： 根据答案我的问题可以稍微改进一下（使树的代码更短）姆韦：

\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 "EL=east"
      pos=0.6}
        }
    \begin{forest}
for tree={
    draw,
    semithick,
    parent anchor=children,
  l sep=13 mm,
  s sep=4mm,
    where level=1{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]{$#1$}}
    }
                            }
                }
[SimilarityScore1
    [loooooongeteeext, EL=\leq 0.904712    
        [loooooongeteeext,EL=\leq 0.896089]
        [loooooongeteeext,EL=\geq 0.896089]
    ]
    [loooooongeteeext, EL=\geq 0.904712
        [loooooongeteeext,EL=\leq 0.896089]
        [loooooongeteeext,EL=\geq 0.896089]
    ]
]
    \end{forest}
\end{document}

这给出了更好的结果：

在此处输入图片描述

答案3

一个完全不同的方法可以让你让整个方法更加通用，就是这样做。如果你有多棵树，而且它们并不都拥有完全相同的结构，那么这也会对你有所帮助

\documentclass{article}
\usepackage{tikz}
\begin{document}
    \begin{tikzpicture}[-,thick,
    level 1/.style={sibling distance=6cm},
    level 2/.style={sibling distance=2.5cm}
    ]
    \footnotesize
    \node {similarity score}
        child {node {looooong text 1} 
            child {node {looooong text 1a}} 
            child {node {looooong text 1b}}
        }
        child {node {looooong text 2} 
            child {node {looooong text 2a}}
            child {node {looooong text 2b}}
        }
    ;
    \end{tikzpicture}
\end{document}

您还可以添加方框和标签

\documentclass{article}
\usepackage{tikz}
\begin{document}
    \begin{tikzpicture}[-,thick,
    level 1/.style={sibling distance=6cm},
    level 2/.style={sibling distance=2.5cm}, 
  box/.style={draw=blue!80}
    ]
    \footnotesize
    \node[box] {similarity score}
        child {node[box] {looooong text 1} 
            child {node[box] {looooong text 1a} edge from parent node[left] {$<3$} } 
            child {node[box] {looooong text 1b} edge from parent node[right] {$\geq3$} }
            edge from parent node[left] {$<3$}
        }
        child {node[box] {looooong text 2} 
            child {node[box] {looooong text 2a} edge from parent node[left] {$<3$}}
            child {node[box] {looooong text 2b} edge from parent node[right] {$\geq3$}}
            edge from parent node[right] {$\geq3$}
        }
    ;
    \end{tikzpicture}
\end{document}

在此处输入图片描述

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