Kdtyjb

I am having an issue when trying to connect the edges of some nodes (I am doing this on overleaf). If I only choose one of the nodes at the top and connect the edges with the nodes I intend to use on the bottom, it will have no issue compiling. I try to do this with the other node on the top as written in my code but it does not compile. I believe there is a more efficient way to do this, but I am don't see any mistake in what I have. I hope someone can please help me with this. Any help, much appreciated.

documentclass[a4paper]{article}

usepackage[utf8]{inputenc}

usepackage[T1]{fontenc}

usepackage{amssymb}

usepackage{tikz}

usetikzlibrary{calc,shapes}

letoldemptysetemptyset

letemptysetvarnothing

begin{document}

begin{tikzpicture}[every node/.style={circle,draw=black},scale=0.75,every 

node/.append style={transform shape}]

node(tre1)[circle,draw,scale=0.5]{

begin{tikzpicture}

node(one){1}

child{node{2}}

child{node{3}};

end{tikzpicture}

};

node(tre2)[circle,draw,scale=0.5] [right of=tre1,xshift=6.2cm]{

begin{tikzpicture}

node(tree2){1}

child{node{2}

child{node{3}}};

end{tikzpicture}

};

node at ($(tre1) + (-3.5,-4.5)$)[circle,draw,scale=0.65](tr1){

begin{tikzpicture}

node(one){1}

child{node{2}};

node[xshift=1cm]{3};

end{tikzpicture}

};

node(tr2)[circle,draw,scale=0.65][right of=tr1,xshift=2.8cm]{

begin{tikzpicture}

node(one){1}

child{node{3}};

node[right of=one]{2};

end{tikzpicture}

};

node(tr3)[circle,draw,scale=0.75][right of=tr2,xshift=2.25cm]{

begin{tikzpicture}

node(two){2}

child{node{3}};

node[right of=one]{1};

end{tikzpicture}

};

node at ($(tre1) + (2,-13.5)$)(root)[circle,draw,scale=0.9]{

begin{tikzpicture}  

node(one){1};

node[below of=one](two){2};

node[right of=one]{3};

node[right of=two]{4};

end{tikzpicture}

};   

path[thick](tre1.south)edge node[sloped,yshift=0.5em,draw=none,fill=none]{} 

(tr1.north)

edge node[sloped,yshift=0.5em,draw=none,fill=none]{}(tr2.north)

path[thick](tre2.south)edge node[sloped,yshift=0.5em,draw=none,fill=none]{} 

(tr3.north)



end{tikzpicture};

end{document}

end{document}

This is likely not yet quite what you want but it avoids nesting tikzpictures and can then be a basis for getting what you want.

documentclass[a4paper]{article}

usepackage[utf8]{inputenc}

usepackage[T1]{fontenc}

usepackage{amssymb}

usepackage{tikz}

usetikzlibrary{calc,shapes,fit,positioning}

letoldemptysetemptyset

letemptysetvarnothing

begin{document}

begin{tikzpicture}[every node/.style={circle,draw=black},scale=0.75,every 

node/.append style={transform shape}]

begin{scope}[local bounding box=f1,scale=0.5]

node(one1){1}

child{node{2}}

child{node{3}};

end{scope}

node[circle,draw,fit=(f1)](tre1){};

%

begin{scope}[local bounding box=f2,scale=0.5]

node[above right=0.1cm and 10cm of one1](tree2){1}

child{node{2}

child{node{3}}};

end{scope}

node(tre2)[circle,draw,fit=(f2)] {};

%

begin{scope}[local bounding box=f3,scale=0.65]

node at ($(one1) + (-3.5,-4.5)$) (one2){1}

child{node{2}};

node[right=of one2]{3};

end{scope}

node [circle,draw,fit=(f3)](tr1){};

%

begin{scope}[local bounding box=f4,scale=0.65]

node[right=4cm of one2] (one3){1}

child{node{3}};

node[right of=one3]{2};

end{scope}

node(tr2)[circle,draw,fit=(f4)]{};

%

begin{scope}[local bounding box=f5,scale=0.75]

node[right=3cm of one3] (two1){2}

child{node{3}};

node[right=of two1]{1};

end{scope}

node(tr3)[circle,draw,fit=(f5)]{};

%

begin{scope}[local bounding box=f6,scale=0.9]  

node at ($(one1) + (2,-13.5)$) (one4){1};

node[below of=one4](two2){2};

node[right of=one4]{3};

node[right of=two2]{4};

end{scope}

node[circle,draw,fit=(f6)]  (root){};   

%

path[thick](tre1.south)edge %node[sloped,yshift=0.5em,draw=none,fill=none]{} 

(tr1.north) (tre1.south)

edge %node[sloped,yshift=0.5em,draw=none,fill=none]{}

(tr2.north);

path[thick](tre2.south)edge %node[sloped,yshift=0.5em,draw=none,fill=none]{} 

(tr3.north);

end{tikzpicture}

end{document}