Mdthbs

I'd like to typset the tree on the left of the image. Unfortunately, TikZ seems way to complicated to me... I tried with this code, without success

documentclass{beamer}

usepackage{tikz} % Game theory packages

usetikzlibrary{calc}



% Node styles

tikzset{

% Two node styles for game trees: solid and hollow

solid node/.style={circle,draw,inner sep=1.5,fill=black},

hollow node/.style={circle,draw,inner sep=1.5}

}



begin{document}



begin{frame}

    begin{tikzpicture}[scale=0.7,font=footnotesize]

        % Specify spacing for each level of the tree

            tikzstyle{level 1}=[level distance=18mm,sibling distance=27mm]

            tikzstyle{level 2}=[level distance=18mm,sibling distance=27mm]

        % The Tree

        node(0)[hollow node,label=above:{$1$}]{}

            child{node(1)[solid node, label=above:{$2$}]{}

                child{node(0-1-1)[solid node, label=above:{$1$}]{} edge from parent node[left]{$E$}}

                child{node(0-1-2)[label=below:{$(3,1)$}]{} edge from parent node[right]{$F$}}                                   

                    child{node(0-1-1-1)[label=below:{$(1,2)$}]{} edge from parent node[right]{$G$}} % The error is here

                edge from parent node[left,xshift=-3]{$C$}          

        }

            child{node(2)[label=below:{$(0,3)$}]{} edge from parent node[right, xshift=3]{$D$}

            };



        end{tikzpicture}

end{frame}

end{document}

I'd like also to ask you if something easier for game theory than Tikz exists for trees.

Note that there is a package, istgame, which specializes on game trees. For general trees, forest is a very powerful tool. It allows you to draw your tree very easily.

documentclass{article}

usepackage{forest}

forestset{el/.style={edge label={node [pos=0.7,above,outer sep=3pt] {$#1$} }}}

begin{document}

begin{forest}

for tree={circle,fill,inner sep=1pt,calign=fixed edge angles}

[,label=above:1

 [,label=above left:2,el=A

  [,label=above left:1,el=C

   [,label=below:{0,2},el=E ]

   [,label=below:{2,0},el=F ]

  ]

  [,label=below:{1,1},el=D]

 ]

 [,label=below:{3,3},el=B]

]

end{forest}

end{document}

My plain TikZ code is a bit long but easy to read.

documentclass{article}

%documentclass{beamer}

usepackage{tikz}

begin{document}

%begin{frame}  

begin{center}

begin{tikzpicture}[scale=1,

h/.style={circle,draw=magenta,thick,inner sep=1.5},

s/.style={h,fill=magenta}]

path

(0,0)     node[h] (1)  {} node[above] {1}  

+(1,-1)   node[s] (2b) {} node[below] {3,3}

++(-1,-1) node[s] (2a) {} node[left]  {2}  

+(1,-1)   node[s] (3b) {} node[below] {1,1}

++(-1,-1) node[s] (3a) {} node[left]  {1}  

+(1,-1)   node[s] (4b) {} node[below] {0,2}

+(-1,-1)  node[s] (4a) {} node[below] {2,0};



draw (1)

--(2a) node[pos=.4,left]{A}

--(3a) node[pos=.4,left]{C}

--(4a) node[pos=.4,left]{E}

(1)--(2b)  node[pos=.4,right]{B}

(2a)--(3b) node[pos=.4,right]{D}

(3a)--(4b) node[pos=.4,right]{F};



newcommand{putcolumn}[6]{%

path #1 node{#2} 

++(-90:1)  node{#3} ++(-90:1) node{#4}

++(-90:1)  node{#5} ++(-90:1) node{#6};

}%

begin{scope}[shift={(4,0)}]

draw (0,0) grid (2,-4);

putcolumn{(.5,.5)}{C}{2,0}{0,2}{3,3}{3,3}

putcolumn{(1.5,.5)}{D}{1,1}{1,1}{3,3}{3,3}

putcolumn{(-.5,.5)}{}{AE}{AF}{BE}{BF}

end{scope}

end{tikzpicture}

end{center}

%end{frame}    

end{document}

I propose this short code with pstricks – more specifically pst-tree:

documentclass{article}

usepackage[utf8]{inputenc}

usepackage[T1]{fontenc}

usepackage{fourier}

usepackage{pst-tree}

usepackage{auto-pst-pdf}



begin{document}



begin{pspicture}

psset{tnsep=1pt, labelsep=3pt}

pstree[nodesep=0pt, levelsep=1.5cm, treesep=3cm]{Tc{2pt}~[ tnpos=a, tnsep=-1pt]{1}} {

        pstree{Tdotnbput{$ A $} uput[ul](pssucc){$ 2 $}} {%

                pstree{Tdot nbput{$ C $} uput[ul](pssucc){{1}}}{%

                        pstree{Tdot nbput{$ E $} uput[ul](pssucc){{2}}}{}%

                        Tdotnaput{$F$}uput[d](pssucc){$0,2$}}%

        Tdot_{$D$} uput[d](pssucc){$1,1$}}%

Tdot_{$B$} uput[d](pssucc){$3,3$}}

    end{pspicture}%



 end{document}

My attempt with tikz-qtree, but I did not find out how to fix the angles:

usepackage{tikz-qtree}



tikzset{grow'=down}



begin{document}

    begin{standalone}

        begin{tikzpicture}[level distance=30pt,

                            sibling distance=10pt,

                            every tree node/.style={draw,circle,inner sep=0pt,minimum size=3pt},

                            edge from parent path={(tikzparentnode) -- (tikzchildnode)},

                            ]

            Tree   [. node[label=above:1] {}; 

                        edge node[auto=left,pos=.6] {$B$};

                            [. node[fill=black,label=below:{3,3}] {}; ]

                        edge node[auto=right,pos=.6] {$A$};

                            [.node[fill=black,label=above left:2] {}; 

                                edge node[auto=left,pos=.6] {$D$};

                                    [.node[fill=black,label=below:{1,1}] {}; ]

                                edge node[auto=right,pos=.6] {$C$};

                                [.node[fill=black,label=above left:1] {}; 

                                edge node[auto=left,pos=.6] {$F$};

                                    [.node[fill=black,label=below:{2,2}] {}; ]

                                edge node[auto=right,pos=.6] {$E$};

                                    [.node[fill=black,label=above left:2] {}; ] 

                                ]

                            ]

                    ]     

        end{tikzpicture}   

    end{standalone}

end{document}