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如何更改箭头上的文本位置和角度，以及如何更改 TikZ 中框的位置？

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如何更改箭头上的文本位置和角度，以及如何更改 TikZ 中框的位置？

我正在使用 TikZ 制作路径图。代码如下

\documentclass[landscape]{article}

\usepackage[latin1]{inputenc}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows}
\begin{document}
\pagestyle{empty}


% Define block styles
\tikzstyle{decision} = [diamond, draw, fill=blue!20, 
    text width=4.5em, text badly centered, node distance=3cm, inner sep=0pt]
\tikzstyle{block} = [rectangle, draw, fill=blue!20, 
    text width=6em, text centered, rounded corners, minimum height=4em]
\tikzstyle{line} = [draw, -latex']
\tikzstyle{cloud} = [draw, ellipse,fill=red!20, node distance=3cm,
    minimum height=2em]
\begin{tikzpicture}[node distance = 3cm, auto][bend angle=45]
\node [block] (sq1) {PM};
\node [block, below of=sq1] (sq2) {KP};
\node [block, below of=sq2] (sq3) {TKW};
\node [block, left of=sq1,node distance=7cm] (sq4) {PM.GMXTD};
\node [block, left of=sq2,node distance=7cm] (sq5) {KP.GHM};
\node [block, left of=sq3,node distance=7cm] (sq6) {PM.GPRF};
\node [block, below of=sq6] (sq7) {KP.GMNTD};
\node [block, right of=sq2,node distance=7cm] (sq8) {Yield};
\path [line] (sq4) -- node {0.35}(sq1);
\path [line] (sq5) -- node {0.232}(sq2);
\path [line] (sq6) -- node {0.393}(sq3);
\path [line] (sq7) -- node {0.26}(sq3);
\path [line] (sq1) -- node {0.807}(sq8);
\path [line] (sq2) -- node {1.189}(sq8);
\path [line] (sq3) -- node {0.653}(sq8);
\path [line] (sq2) -- node {-0.926}(sq3);
\path [line] (sq1) -- node {-0.65}(sq2);
\path [line] (sq1) to [bend left=45] node {-0.528}(sq3);
\path [line] (sq4) to [bend left=45] node {0.158}(sq8);
\path [line] (sq7) to [bend right=45] node {0.207}(sq8);
\path [line] (sq5) to [bend left=55] node {0.456}(sq8);
\end{tikzpicture}
\end{document}

在此处输入图片描述

我有以下三个问题。

1）是否可以沿着箭头改变文本的位置？

2）是否可以沿箭头旋转文本？

3）我可以在两个框的左中间画一个框吗？

提前致谢。

答案1

以下是一些可以让事情变得更容易的想法，尽管需要进行大量的手动小调整：

\documentclass{minimal}
\usepackage{tikz}
\usetikzlibrary{matrix,calc}
\tikzset{
  mymx/.style={
    matrix of nodes, % this option is available after loading the matrix library
    nodes=block,
    row sep=2cm, % the amount of space separating the nodes vertically
    column sep=3cm, % ^same, but horizontally
  },
  block/.style={
    rectangle,
    draw,
    fill=blue!20,
    rounded corners,
    text width=6em,
    align=center,
    minimum height=4em
  },
  lbl/.style={
    above,
    sloped, % make the text follow the path
    execute at begin node={$}, % begin math mode, for the minus signs etc.
    execute at end node={$}, % end math mode
  }
}
\begin{document}
\begin{tikzpicture}
  \matrix[mymx] (mx) { % give the name "mx" to this matrix
    PM.GMXTD & PM \\
    KP.GHM   & KP & Yield \\
    PM.GPRF  & TKW \\
    KP.GMNTD \\
  };
  % now the cells of the matrix are available as, eg.:
  % (mx-1-2) means the second column on the first row
  %
  \path[-latex,every node/.style=lbl]
    (mx-1-1) edge[bend left=45] node {0.158} (mx-2-3)
             edge node {0.35} (mx-1-2)
    (mx-2-1) edge[bend left,pos=.4] node {0.456} ([yshift=-1ex]mx-2-3.north west)
             edge node {0.232} (mx-2-2)
    (mx-3-1) edge node {0.393} (mx-3-2)
    (mx-4-1) edge node {0.26} (mx-3-2)
             edge[bend right] node {0.207} (mx-2-3)
    (mx-1-2) edge node[pos=.7] {-0.65} (mx-2-2)
             edge[bend left,looseness=1.4,pos=.3] node {-0.528} (mx-3-2)
             edge node {0.807} (mx-2-3)
    (mx-2-2) edge node {1.189} (mx-2-3)
             edge node {-0.926} (mx-3-2)
    (mx-3-2) edge node {0.653} (mx-2-3)
    ;
  % to put a node in the middle of something, using the calc library:
  \begin{scope}[every node/.style={execute at begin node=\strut}]
    \node              at ($(mx-1-1)!.5!(mx-2-1)$) {mid};
    \node[anchor=west] at ($(mx-1-1.west)!.5!(mx-2-1.west)$) {left};
    \node[anchor=east] at ($(mx-1-1.east)!.5!(mx-2-1.east)$) {right};
  \end{scope}
\end{tikzpicture}
\end{document}

在此处输入图片描述

答案2

对于文本位置使用 [pos=0.xxx]

\begin{tikzpicture}[node distance = 3cm, auto][bend angle=45]
\node [block] (sq1) {PM};
\node [block, below of=sq1] (sq2) {KP};
\node [block, below of=sq2] (sq3) {TKW};
\node [block, left of=sq1,node distance=7cm] (sq4) {PM.GMXTD};
\node [block, left of=sq2,node distance=7cm] (sq5) {KP.GHM};
\node [block, left of=sq3,node distance=7cm] (sq6) {PM.GPRF};
\node [block, below of=sq6] (sq7) {KP.GMNTD};
\node [block, right of=sq2,node distance=7cm] (sq8) {Yield};
\path [line] (sq4) -- node[pos=0.3] {0.35}(sq1);
\path [line] (sq5) -- node[pos=0.1] {0.232}(sq2);
\path [line] (sq6) -- node[pos=0.8] {0.393}(sq3);
\path [line] (sq7) -- node {0.26}(sq3);
\path [line] (sq1) -- node {0.807}(sq8);
\path [line] (sq2) -- node {1.189}(sq8);
\path [line] (sq3) -- node {0.653}(sq8);
\path [line] (sq2) -- node {-0.926}(sq3);
\path [line] (sq1) -- node {-0.65}(sq2);
\path [line] (sq1) to [bend left=45] node[pos=0.4] {-0.528}(sq3);
\path [line] (sq4) to [bend left=45] node {0.158}(sq8);
\path [line] (sq7) to [bend right=45] node {0.207}(sq8);
\path [line] (sq5) to [bend left=55] node[pos=0.4] {0.456}(sq8);
\end{tikzpicture}

对于旋转，使用倾斜

\path [line] (sq1) -- node[sloped] {0.807}(sq8);

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