![二项树中的垂直线破坏了节点着色](https://linux22.com/image/255099/%E4%BA%8C%E9%A1%B9%E6%A0%91%E4%B8%AD%E7%9A%84%E5%9E%82%E7%9B%B4%E7%BA%BF%E7%A0%B4%E5%9D%8F%E4%BA%86%E8%8A%82%E7%82%B9%E7%9D%80%E8%89%B2.png)
如何阻止虚拟节点被着色?
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix,fit,backgrounds,calc}
\begin{document}
\begin{tikzpicture}[>=stealth,sloped]
\matrix (tree) [%
matrix of nodes,
minimum size=1cm,
column sep=2.5cm,
row sep=0.4cm,
column 2/.style={nodes={draw,fill=green!30,rounded corners}},
column 3/.style={nodes={draw,fill=red!30,rounded corners}},
]
{
& |(top-left)| & |(top-right)| & $_0 S_T$ \\
& & $_0S_{2\Delta t}$ & \\
& $_0S_{\Delta t}$ & & $_1 S_T$ \\
$_0S_0$ & & $_1S_{2\Delta t}$ & \\
& $_1S_{\Delta t}$ & & $_2 S_T$ \\
& & $_2S_{2\Delta t}$ & \\
& |(bottom-left)| & |(bottom-right)| & $_3 S_T$ \\
};
\draw[->] (tree-4-1) -- (tree-3-2) node [midway,above] {$p$};
\draw[->] (tree-4-1) -- (tree-5-2) node [midway,below] {$1-p$};
\draw[->] (tree-3-2) -- (tree-2-3) node [midway,above] {};
\draw[->] (tree-3-2) -- (tree-4-3) node [midway,below] {};
\draw[->] (tree-5-2) -- (tree-4-3) node [midway,above] {};
\draw[->] (tree-5-2) -- (tree-6-3) node [midway,below] {};
\draw[->] (tree-2-3) -- (tree-1-4) node [midway,above] {};
\draw[->] (tree-2-3) -- (tree-3-4) node [midway,below] {};
\draw[->] (tree-4-3) -- (tree-3-4) node [midway,above] {};
\draw[->] (tree-4-3) -- (tree-5-4) node [midway,below] {};
\draw[->] (tree-6-3) -- (tree-5-4) node [midway,above] {};
\draw[->] (tree-6-3) -- (tree-7-4) node [midway,below] {};
% t-line
\draw[dashed] ($(top-left.north)!.5!(top-right.north)$) -- ($(bottom-left.south)!.5!(bottom-right.south)$);
\node at ($(bottom-left.south)!.5!(bottom-right.south)-(0,1em)$) {$\tau$};
\end{tikzpicture}
\end{document}
答案1
您可以使用draw=none
和fill=none
。在这里,我将两者都放在一个名为的样式中dummy
:
代码
\matrix (tree) [%
matrix of nodes,
minimum size=1cm,
column sep=2.5cm,
row sep=0.4cm,
column 2/.style={nodes={draw,fill=green!30,rounded corners}},
column 3/.style={nodes={draw,fill=red!30,rounded corners}},
dummy/.style={fill=none,draw=none}
]
{
& |[dummy](top-left)| & |[dummy](top-right)| & $_0 S_T$ \\
& & $_0S_{2\Delta t}$ & \\
& $_0S_{\Delta t}$ & & $_1 S_T$ \\
$_0S_0$ & & $_1S_{2\Delta t}$ & \\
& $_1S_{\Delta t}$ & & $_2 S_T$ \\
& & $_2S_{2\Delta t}$ & \\
& |[dummy](bottom-left)| & |[dummy](bottom-right)| & $_3 S_T$ \\
};