[Tex/LaTex] Directed graphs with labels

graphstikz-pgf

I was trying to draw this graph but as you see two labels—x_1 and x_3—on the edges of 0110 and 1010 in the third row interfere. How can I fix it? And also do you have any opinion how I can write with a bigger and bald font in the circles and to insert the graph in the center of the page?

\documentclass{article}

\usepackage{pgf}
\usepackage{tikz}
\usetikzlibrary{arrows,automata}
\usepackage[latin1]{inputenc}
\usepackage{verbatim}

\begin{document}

\begin{tikzpicture}[-triangle 60,auto,node distance=3.7cm,ultra thick]
\tikzstyle{every state}=[circle,thick,draw=blue!75,fill=blue!20,minimum 
 size=20mm,text=black,minimum width=1cm]

\node[state] (A)    {$0000$};
\node[state] (B) [below of=A] {$0100$}; 
\node[state] (C) [left of=B]  {$0010$};  
\node[state] (D) [right of=B] {$1000$};

\node[state] (E) [below of=B] {$1100$}; 
\node[state] (F) [left of=E]  {$0101$};
\node[state] (G) [left of=F]  {$0011$};
\node[state] (H) [right of=E] {$0110$};
\node[state] (I) [right of=H] {$1010$};

\node[state] (J) [below of=F] {$0111$};

\node[state] (K) [below of=H] {$0111$};

\path (B) edge      node {$x_2$} (A)          
      (C) edge      node {$x_3$} (A)            
      (D) edge      node {$x_1$} (A)

      (E) edge      node {$x_1$} (B)
          edge      node {$x_2$} (D)                       
      (F) edge      node {$x_4$} (B)        
      (G) edge      node {$x_4$} (C)                
      (H) edge      node {$x_2$} (C)
          edge      node {$x_3$} (B)                  
      (I) edge      node {$x_1$} (C)
          edge      node {$x_3$} (D)

      (J) edge      node {$x_2$} (G)
          edge      node {$x_3$} (F)
          edge      node {$x_4$} (H)

      (K) edge      node {$x_1$} (G)
          edge      node {$x_4$} (I);
      \end{tikzpicture}

      \end{document}

Best Answer

You can use the optional commands for node:

above, below, left, right: Position of the node
pos=x with x in [0,1]: Relative position of the node on the arrow
xshift=x, yshift=x where x is a distance: Shift on x or y axes

Here is the adapted code. I removed some unused imports and changed the documentclass to standalone.

\documentclass[margin=5mm]{standalone}

\usepackage{tikz}
\usetikzlibrary{arrows,automata}
\usepackage[latin1]{inputenc}

\begin{document}

\begin{tikzpicture}[-triangle 60,auto,node distance=3.7cm,ultra thick]
    \tikzstyle{every state}=[circle,thick,draw=blue!75,fill=blue!20,minimum 
     size=20mm,text=black,minimum width=1cm]

    \node[state] (A)    {$0000$};
    \node[state] (B) [below of=A] {$0100$}; 
    \node[state] (C) [left of=B]  {$0010$};  
    \node[state] (D) [right of=B] {$1000$};

    \node[state] (E) [below of=B] {$1100$}; 
    \node[state] (F) [left of=E]  {$0101$};
    \node[state] (G) [left of=F]  {$0011$};
    \node[state] (H) [right of=E] {$0110$};
    \node[state] (I) [right of=H] {$1010$};

    \node[state] (J) [below of=F] {$0111$};

    \node[state] (K) [below of=H] {$0111$};

    \path (B) edge      node{$x_2$} (A)
          (C) edge      node{$x_3$} (A)
          (D) edge      node{$x_1$} (A)

          (E) edge      node[pos=0.3]{$x_1$} (B)
              edge      node[pos=0.7,above,xshift=-1mm]{$x_2$} (D)
          (F) edge      node{$x_4$} (B)
          (G) edge      node{$x_4$} (C)
          (H) edge      node[pos=0.1] {$x_2$} (C)
              edge      node[pos=0.7,above,xshift=1mm]{$x_3$} (B)
          (I) edge      node[pos=0.3,above]{$x_1$} (C)
              edge      node {$x_3$} (D)

          (J) edge      node{$x_2$} (G)
              edge      node{$x_3$} (F)
              edge      node{$x_4$} (H)

          (K) edge      node{$x_1$} (G)
              edge      node{$x_4$} (I);
\end{tikzpicture}

\end{document}

To change font size in tikz automata you can use:

\tikzset{every state/.append style={font=\Large}}

Related Solutions

[Tex/LaTex] Drawing graphs with multiline labels for vertex/edge

I'm the author of this package. The good news are the new versions of tkz-graph and tkz-berge will be on the ctan servers this week (i'm working on the docs actually), the bad news are that I modified some macros. I'm not sure to understand exactly what you want but an answer is that you can put TikZ's code inside you code.

Vertices are nodes so you can add multiple labels if you want with the option label= , if you want adding a text you can use the option text width

something like :

  \SO(P){X1}
  \node[text width=2cm,left=1cm] (X1){the protocol starts here};

Another possibility :

\begin{tikzpicture}
{  \SetVertexNoLabel   
   \Vertex[style={label=60:A}]{A}}
 \SO[Lpos=180,
     LabelOut,
     L= {the protocol starts here},
     style={text width=2cm}](A){B}
 \end{tikzpicture}

But there are other ways to do this. You can use label. In your code you used "position" , it's not very fine because it's a problem to use "scale".

In 12 hours, I will upload the new version of tkz-graph. I the new version node distanceis obsolete, now I added an option unit and a macro \tkzGraphUnit=6 instead of `\tikzset{node distance=6cm}.

[Tex/LaTex] Rotate a node but not its content: the case of the ellipse decoration

The source of the difficulty is that ellipses are constructed in a particular way in TikZ. They are paths that start from the x-axis and proceed counter-clockwise around their centre. The vast majority of the time, the exact parametrisation doesn't matter. You appear to have found the one situation where it does!

In the actual question, you only want to be able to mirror the ellipse, and so draw it starting from the negative x-axis (the title of the question suggests a more flexible approach). That's actually not too hard since we can exploit the symmetry of the ellipse. The key is to provide it with a negative x-radius, since then it will start from the negative x-axis (and proceed clockwise, but we could correct for that by negating the y-radius as well). To do this, we interrupt the call from the node shape to the drawing command and flip the sign of the x-radius. The simplest way to do this is to redefine the \pgfpathellipse macro to do the negation and then call the original macro. The following code does this.

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{decorations,shapes,decorations.markings}
\makeatletter
\let\origpgfpathellipse=\pgfpathellipse
\def\revpgfpathellipse#1#2#3{%
  #2%
  \pgf@xa=-\pgf@x
  \origpgfpathellipse{#1}{\pgfqpoint{\pgf@xa}{0pt}}{#3}}
\makeatother

\tikzset{
  reversed ellipse/.style={
    ellipse,
    reverse the ellipse%
  },
  reverse the ellipse/.code={
    \let\pgfpathellipse=\revpgfpathellipse
  }
}
\begin{document}
\begin{tikzpicture}
\node[ellipse,
  draw,
  postaction={
    decorate,
    decoration={
      markings,
      mark=at position 1 with {
        \arrow[line width=5pt,blue]{>}
      }
    }
  }
] at (0,0) {hello world};

\node[reversed ellipse,
  draw,
  postaction={
    decorate,
    decoration={
      markings,
      mark=at position 1 with {
        \arrow[line width=5pt,blue]{>}
      }
    }
  }
] at (0,-2) {hello world};
\end{tikzpicture}

\end{document}

Here's the result:

rotated ellipse

(the arrow got clipped, but you can see where it lies)

Best Answer

Related Solutions

[Tex/LaTex] Drawing graphs with multiline labels for vertex/edge

[Tex/LaTex] Rotate a node but not its content: the case of the ellipse decoration

Related Question