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在决策树箭头附近插入浮动文本

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在决策树箭头附近插入浮动文本

如何在实线箭头旁边插入“是”和“否”？

我尝试node [near end, right] {Yes}在每个节点和子声明之后放置它，但是这只会扰乱决策树的流程。

代码

    \noindent
    \begin{figure}[htbp]
      \centering 
      \sffamily

      \tikzstyle{level 1}=[level distance=1.5cm, sibling distance=4.25cm]
      \tikzstyle{level 2}=[level distance=1.5cm, sibling distance=2.25cm]
      \tikzstyle{level 3}=[level distance=1.5cm, sibling distance=4.25cm]
      \tikzstyle{level 4}=[level distance=1.5cm, sibling distance=2.25cm]

      \tikzset{decision/.style={
        draw=gray-5-border, solid, fill=gray-e-bg, rectangle, 
        anchor=north,
        inner sep=2mm, outer sep=0, text centered, growth parent anchor=south} 
      }
      \tikzset{prediction/.style={
        draw=gray-4-border, solid, fill=gray-d-bg, ellipse, 
        anchor=north,
        inner sep=2mm, outer sep=0, text centered, growth parent anchor=south} 
      }
      \tikzset{arrow/.style={-latex, thick}}
      \tikzset{arrow-dashed/.style={-latex, dashed, thick}}

      \begin{tikzpicture}
        \node [prediction] {+0.5} [dashed, -latex, thick, ->]
          child { 
            node [decision] {$a < 4.5$} [->]
              child {
                node [prediction] {-0.7} [solid, -latex, thick, ->] 
                  child {
                    node [decision] {$b > 1$} [dashed, -latex, thick, ->]
                      child {
                        node [prediction] {+0.4} [solid, -latex, thick, ->]
                      }
                      child {
                        node [prediction] {-0.2} [solid, -latex, thick, ->]
                      }
                  }
                  child {
                    node [decision] {$a > 2$} [dashed, -latex, thick, ->]
                      child {
                        node [prediction] {-0.1} [solid, -latex, thick, ->]
                      }
                      child {
                        node [prediction] {+0.1} [solid, -latex, thick, ->]
                      }
                  }
              }
              child {
                node [prediction] {+0.2} [solid, -latex, thick, ->]
              }
          }
          child {
            node [decision] {$b > 0$}
              child {
                node [prediction] {+0.3} [solid, -latex, thick, ->]
              }
              child {
                node [prediction] {-0.6} [solid, -latex, thick, ->]
              }
          }
        ;
      \end{tikzpicture}

      \caption{A diagram of Freund and Mason's general alternating decision tree}
      \label{fig:diagram-adt}
    \end{figure}

输出

在此处输入图片描述

答案1

你需要使用

node [prediction {$-0.7$} edge from parent [dashed] node [near end, right] {Yes}

我还要补充-latex, thick一点edge from parent，这样您就不必每次都重复常用选项。

我还->从选项中删除了它，因为你已经-latex在里面了，它将->覆盖-latex´ with-to (or to whatever>`设置）。

请注意，我还使用了数学模式，以便-0.7正确排版减号（建议用于text depth=+0pt节点，因为减号增加了一定的深度，但也是如此+）。

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