[Tex/LaTex] How to make a vertex with math inside using tkz-graph

graphstikz-pgftkz-graph

Okay, my goal is to make a diagram like this in LaTeX:

enter image description here

With the difference, that I want where you see dots or dots2, I want to have $\ldots$ displayed. I'm trying to get that working using the tkz-graph package. My only experience with tikz is that package, so therefore I'm trying to do this in that way. I know that I can use \Vertices{line}{0,1,dots,i,i+1,dots2} to get all the vertices in a line, but I don't know how to get a vertex with math inside. I tried \Vertices{line}{0,1,$\ldots$,i,i+1,dots2} but that wont work.

\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath, amssymb, amsthm}
\usepackage{tkz-graph}
\tikzset{EdgeStyle/.append style = {->}}
\tikzset{LabelStyle/.style= {draw,
fill = white,
text = black}}

\begin{document}
\begin{tikzpicture}
\SetGraphUnit{2}
\Vertices{line}{0,1,dots,i,i+1,dots2}
\Edge[label=q](1)(0)
\tikzset{EdgeStyle/.append style = {bend left}}
\Edge[label=p](1)(dots)
\Edge[label=q](dots)(1)
\Edge[label=p](dots)(i)
\Edge[label=q](i)(dots)
\Edge[label=p](i)(i+1)
\Edge[label=q](i+1)(i)
\Edge[label=p](i+1)(dots2)
\Edge[label=q](dots2)(i+1)
\end{tikzpicture}
\end{document}

Best Answer

You can use Math option. But this can't be mixed with other vertices which are not having math content. Hence we have to split the entire line and use x and y values to position them properly:

\Vertices{line}{0,1}
\Vertex[Math,L=\ldots,x=4,y=0] {dots}
\Vertices[x=6,y=0]{line}{i,i+1}
\Vertex[Math,L=\ldots,x=10,y=0] {dots2}

Full code:

\documentclass[12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage{amsmath, amssymb, amsthm}
\usepackage{tkz-graph}
\tikzset{EdgeStyle/.append style = {->}}
\tikzset{LabelStyle/.style= {draw,
fill = white,
text = black}}

\begin{document}
\begin{tikzpicture}
\SetGraphUnit{2}
\Vertices{line}{0,1}
\Vertex[Math,L=\ldots,x=4,y=0] {dots}
\Vertices[x=6,y=0]{line}{i,i+1}
\Vertex[Math,L=\ldots,x=10,y=0] {dots2}
\Edge[label=q](1)(0)
\tikzset{EdgeStyle/.append style = {bend left}}
\Edge[label=p](1)(dots)
\Edge[label=q](dots)(1)
\Edge[label=p](dots)(i)
\Edge[label=q](i)(dots)
\Edge[label=p](i)(i+1)
\Edge[label=q](i+1)(i)
\Edge[label=p](i+1)(dots2)
\Edge[label=q](dots2)(i+1)
\end{tikzpicture}
\end{document}

enter image description here

Related Solutions

TKZ-Graph – Changing Individual Vertex Type

Sorry I need to translate the documentation of tkz-graph. First hte main idea of this package is to provide useful and simple macros and styles to the users. Finally you have two style to know : VertexStyle and EdgeStyle. When you want to draw a graph, you can choice a "general" style with \GraphInit[vstyle=Classic]. This is useful if all your graphs have the same presentation and if inside a graphe, all the vertices have the same style. But you can change the style globally by hand and you can change locally the style.

There are some inconsistency but I need to adapt tkz-graph to pgf 2.1 and pgfkeys. With the new version, I will use only pgfkeys and I will add an english doc.

\documentclass[]{article}
\usepackage{tkz-graph}
\begin{document}

\begin{tikzpicture} 
% the next line  is because you want the style classic for most of the vertices
% if you can't find a style in the predefined styles then you create a style with
% \tikzset{VertexStyle/.style= ....
% if a predefined style is not exactly what you want you can use after the next line
% %\tikzset{VertexStyle/.append style = .....
% You also use : \SetUpVertex  \SetUpVertex[FillColor=red] 
%  \SetUpVertex is to avoid the use of \tikzset{VertexStyle/.append style ....   
\GraphInit[vstyle=Classic]
\SetUpVertex[FillColor=blue!30]  
\Vertex{A}
% with a scope you apply locally a new style but you can  use a tex group {....} instead.
\begin{scope}[VertexStyle/.append style = {minimum size = 5pt, 
                                           inner sep = 0pt,
                                           color=green}]
 \Vertex[x=4,y=2]{B}   
\end{scope}
% here I use  \tikzset
\tikzset{VertexStyle/.append style={rectangle}}
% Now if I want to put the label inside the vertex, I need to pass the style in the  
% options of Vertex with ,LabelOut=false.
% Logically, it's possible with \SetUpVertex but ...
\Vertex[x=4,y=-2,LabelOut=false]{C}  
\end{tikzpicture}    
\end{document}

Conclusion

tkz-graph is useful if you want always the same type of graphs. There is some difficulties to if graphs ara not "homogeneous".

enter image description here

TKZ Graph – Create Graphs with Edges at Same Vertex

There is a \Loop command for this, see the example on page 25 of the manual.

The syntax is

\Loop[<options>](<vertex>)

without any spaces before/after brackets/parens.

In the options one can specify

dir - the possible values are WE, EA, NO, SO, NOWE, NOEA, SOWE, SOEA for west, east, north, south, north west etc., e.g. dir=NO.
dist - defines the size of the loop. Specify a length, e.g. dist=2cm.
label - the label of the vertex, e.g. label={$a$}
style - the style of the loop, allowing you to customize thickness, color etc., e.g. style={green,->,thick}
labelstyle - the style of the label, allowing you to customize positioning, colour etc., e.g. labelstyle={above} to place the label above the loop.

Example

result of code below

\documentclass[convert]{standalone}
\usepackage{tkz-graph}
\begin{document}
\begin{tikzpicture}
\SetUpEdge[lw = 1.5pt, color = blue]
\GraphInit[vstyle=Normal] 
\SetGraphUnit{4}
\tikzset{VertexStyle/.append  style={fill}}
\Vertex{S}
\EA(S){I} \EA(I){R}
\tikzset{EdgeStyle/.style={->}}
\Edge[label=$\beta$](I)(R)
\Edge[label=$\alpha$](S)(I)
\Loop[dir=NO,label={$1-\beta$},labelstyle={above}](I)
\Loop[dir=SO,dist=1cm](R)
\Loop[dir=WE,dist=2cm,style={blue,very thick},label={$1-\alpha$},labelstyle={fill=white}](S)
\end{tikzpicture}
\end{document}

Best Answer

Related Solutions

TKZ-Graph – Changing Individual Vertex Type

TKZ Graph – Create Graphs with Edges at Same Vertex

Example

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