![编辑](https://linux22.com/image/314420/%E7%BC%96%E8%BE%91.png)
我想画这棵树,但我希望树枝上的数据与树枝平行,而不是像我得到的结果谢谢!
\documentclass[12pt,oneside,a4paper,fleqn]{report}
\usepackage{forest}
\usepackage{tikz}
\tikzset{
dot/.style={circle,draw,inner sep=1.5,fill=black},
}
\begin{document}
\begin{forest}
[ ,name=a,for tree={s sep=50pt,l sep=5cm,dot,grow=1},
[ ,name=b,edge label={node[midway, yshift=0.3cm,font=\small]{$p^2_1 =0.6,~ d_1^2=4$}}
[ ,name=c,edge label={node[midway, yshift=0.3cm,font=\small]{$p^3_4 =0.25,~ d_4^3=5$}} ]
[,name=d, edge label={node[midway, yshift=0.3cm,font=\small]{$p^3_3 =0.25,~ d_3^3=2$}} ]
]
[ ,name=e, edge label={node[midway, yshift=0.3cm,font=\small]{$p^2_1 =0.4,~ d_1^2=1.5$}}
[,name=g,edge label={node[midway, yshift=0.3cm,font=\small]{$p^2_1 =0.3,~ d_2^3=5$}} ]
[,name=h,edge label={node[midway, yshift=0.3cm,font=\small]{$p^2_1 =0.2,~ d_1^3=2$}} ]
]
]
\node[yshift=-5cm,name= tiii,font=\small] at (a) {$t=1$};
\node[name= tii,font=\small] at (c|-tiii) {$t=3$};
\node[name= t,font=\small] at (b|-tii) {$t=2$};
\end{forest}
\end{document}
答案1
您的意思是希望边缘标签倾斜吗?
\documentclass[12pt,tikz,a4paper,border=5pt]{standalone}
\usepackage{forest}
\tikzset{
dot/.style={circle,draw,inner sep=1.5,fill=black},
}
\begin{document}
\begin{forest}
my edge label/.style={
edge label={node [midway, sloped, yshift=3mm, font=\small] {#1}}
}
[,name=a, for tree={s sep=50pt, l sep=5cm, dot, grow=0},
[,name=b, my edge label={$p^2_1 =0.6,~ d_1^2=4$}
[,name=c, my edge label={$p^3_4 =0.25,~ d_4^3=5$}
]
[,name=d, my edge label={$p^3_3 =0.25,~ d_3^3=2$}
]
]
[,name=e, my edge label={$p^2_1 =0.4,~ d_1^2=1.5$}
[,name=g, my edge label={$p^2_1 =0.3,~ d_2^3=5$}
]
[,name=h, my edge label={$p^2_1 =0.2,~ d_1^3=2$}
]
]
]
\node[yshift=-5cm,name= tiii,font=\small] at (a) {$t=1$};
\node[name= tii,font=\small] at (c|-tiii) {$t=3$};
\node[name= t,font=\small] at (b|-tii) {$t=2$};
\end{forest}
\end{document}
编辑
您可能还考虑稍微调整一下边缘标签的样式,例如Very23 建议。 例如:
my edge label/.style={
edge label={node [pos=.6, auto, anchor=south, sloped, font=\small] {#1}}
}
或者,您可以进行设置,使下部分支的标签位于线下方,如 Very23 的示例所示,但要forest
担心何时会出现这种情况:
/tikz/my edge labels/.style={pos=.6, sloped, font=\small},
my edge label/.style={
if n=1{
edge label={node [my edge labels, below] {#1}}
}
{
edge label={node [my edge labels, above] {#1}}
}
}
完整代码
\documentclass[12pt,tikz,a4paper,border=5pt]{standalone}
\usepackage{forest}
\tikzset{
dot/.style={circle,draw,inner sep=1.5,fill=black},
}
\begin{document}
\begin{forest}
/tikz/my edge labels/.style={pos=.6, sloped, font=\small},
my edge label/.style={
if n=1{
edge label={node [my edge labels, below] {#1}}
}
{
edge label={node [my edge labels, above] {#1}}
}
}
[,name=a, for tree={s sep=50pt, l sep=5cm, dot, grow=0},
[,name=b, my edge label={$p^2_1 =0.6,~ d_1^2=4$}
[,name=c, my edge label={$p^3_4 =0.25,~ d_4^3=5$}
]
[,name=d, my edge label={$p^3_3 =0.25,~ d_3^3=2$}
]
]
[,name=e, my edge label={$p^2_1 =0.4,~ d_1^2=1.5$}
[,name=g, my edge label={$p^2_1 =0.3,~ d_2^3=5$}
]
[,name=h, my edge label={$p^2_1 =0.2,~ d_1^3=2$}
]
]
]
\node[yshift=-5cm,name= tiii,font=\small] at (a) {$t=1$};
\node[name= tii,font=\small] at (c|-tiii) {$t=3$};
\node[name= t,font=\small] at (b|-tii) {$t=2$};
\end{forest}
\end{document}
如果您想要真正利用forest
的功能(或者至少多利用一点),您还可以将t=
标签指定为树的一部分,并创建一种方便的样式。例如:
\documentclass[12pt,tikz,a4paper,border=5pt]{standalone}
\usepackage{forest}
\tikzset{
dot/.style={circle,draw,inner sep=1.5,fill=black},
}
\usetikzlibrary{positioning}
\begin{document}
\begin{forest}
/tikz/my edge labels/.style={pos=.6, sloped, font=\small},
my edge label/.style={
if n=1{
edge label={node [my edge labels, below] {#1}}
}
{
edge label={node [my edge labels, above] {#1}}
}
},
t value/.style={
tikz={\node [font=\small, below=2cm of |- c] {$t=#1$};}
}
[,name=a, for tree={s sep=50pt, l sep=5cm, dot, grow=0}, t value=1
[,name=b, my edge label={$p^2_1 =0.6,~ d_1^2=4$}, t value=2
[,name=c, my edge label={$p^3_4 =0.25,~ d_4^3=5$}, t value=3
]
[,name=d, my edge label={$p^3_3 =0.25,~ d_3^3=2$}
]
]
[,name=e, my edge label={$p^2_1 =0.4,~ d_1^2=1.5$}
[,name=g, my edge label={$p^2_1 =0.3,~ d_2^3=5$}
]
[,name=h, my edge label={$p^2_1 =0.2,~ d_1^3=2$}
]
]
]
\end{forest}
\end{document}
唯一一个节点需求这里要指出的是,c
但我留下了其他的,因为命名它们往往很有用。
以下是(非常相似的)输出:
答案2
正如 @cfr 在他的回答中提到的那样,你希望你的边缘标签是倾斜的,但是通过删除节点 c 和 g 中的 yshift 选项,你会得到这样的结果
代码
\documentclass[12pt,oneside,a4paper,fleqn]{report}
\usepackage{forest}
\usepackage{tikz}
\tikzset{
dot/.style={circle,draw,inner sep=1.5,fill=black},}
\begin{document}
\begin{forest}
[,name=a,for tree={s sep=50pt,l sep=5cm,dot,grow=1},
[,name=b,edge label={node[midway, yshift=0.3cm,font=\small,sloped]{$p^2_1=0.6,~ d_1^2=4$}}
[,name=c,edge label={node[midway,font=\small,sloped,below]{$p^3_4 =0.25,~ d_4^3=5$}} ]
[,name=d, edge label={node[midway, yshift=0.3cm,font=\small,sloped]{$p^3_3 =0.25,~ d_3^3=2$}} ] ]
[,name=e, edge label={node[midway, yshift=0.3cm,font=\small,sloped]{$p^2_1 =0.4,~ d_1^2=1.5$}}
[,name=g,edge label={node[midway,font=\small,sloped,below]{$p^2_1 =0.3,~ d_2^3=5$}} ]
[,name=h,edge label={node[midway, yshift=0.3cm,font=\small,sloped]{$p^2_1 =0.2,~ d_1^3=2$}} ] ]]
\node[yshift=-5cm,name= tiii,font=\small] at (a) {$t=1$};
\node[name= tii,font=\small] at (c|-tiii) {$t=3$};
\node[name= t,font=\small] at (b|-tii) {$t=2$};
\end{forest}
\end{document}