[Tex/LaTex] How to unite several nodes in one big node using Tikz

nodestikz-trees

I have to implement the Gomory-Hu-Algorithms which requires the reunion of several nodes to one node like it is shown here:

My code is quite simple since the example I want to implement is quite easy and only consists of a graph and a tree that is expanded in each iteration:

\begin{tikzpicture}[auto, node distance=3cm, every loop/.style={},
thick,main node/.style={circle,fill=green!50,draw,font=\sffamily\Large\bfseries},
path/.style={circle, inner sep=2pt,fill=red!50, draw,font=\sffamily\Large\bfseries}]
\tikzstyle{edge_style} = [draw=orange, line width=2, ultra thick]

\node[main node] (b) {a,b,c,d,e};
\node[main node] (a) [below left = 1cm of b] {a};
\node[main node] (c) [right = 1.5cm of b] {c};
\node[main node] (f) [below  = 2cm of b] {f};
\node[main node](e)  [right = 1.5cm of f] {e};
\node[main node](d)  [below right = 1cm of c] {d};
\end{tikzpicture}

As you see till now I am only able to give names like a,b,c,d to a node but what I want is to get a node including nodes with names a,b,c,d.

Best Answer

If all nodes you want to group are close, fit library which defines fit nodes can help you.

I don't understand the relation between the figure and your code, but following code produces the desired figure using a fit node.

\documentclass[border=2mm,tikz]{standalone}
\usetikzlibrary{positioning, fit, shapes.geometric}

\begin{document}
\begin{tikzpicture}[auto, every loop/.style={},
thick,
main node/.style={circle,fill=green!50,draw,font=\sffamily\Large\bfseries},
path/.style={circle, inner sep=2pt,fill=red!50, draw,font=\sffamily\Large\bfseries},
edge_style/.style={draw=orange, line width=2, ultra thick}]

\node[main node] (1) {1};
\node[main node, below= 1mm of 1] (2) {2};
\node[main node, below left= -1mm and 3mm of 1] (0) {0};
\node[main node, below right=-1mm and 3mm of 1] (4) {4};

\node[ellipse, draw=red, fit=(0) (1) (2) (4), inner sep=-1mm] (all) {};

\node[main node, red, fill=gray, above right=5mm and 2cm of all] (3) {3};
\node[main node, blue, fill=gray, below right=5mm and 2cm of all] (5) {5};

\draw (all) -- node [above] {4} (3);
\draw[dashed] (all) -- node[below] {2} (5) -- node[right] {6} (3);
\end{tikzpicture}
\end{document}

Related Solutions

[Tex/LaTex] How to define the default vertical distance between nodes

I don't really get the question so I hope this is what you wanted. If you include a full document (such that we copy paste and see the problem on our systems) things are much more easier.

Here, you can change the default setting within a scope but your block style had a node distance which was resetting every time it is issued. I've made it 2mm such that we can see the difference easier.

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows,shapes.geometric,positioning}

\begin{document}
\begin{tikzpicture}[decision/.style={diamond, draw, text width=4.5em, text badly centered, node distance=3.5cm, inner sep=0pt},
                    block/.style   ={rectangle, draw, text width=6em, text centered, rounded corners, minimum height=4em, minimum height=2em},
                    cloud/.style   ={draw, ellipse, minimum height=2em},
                    line/.style    ={draw,-latex'},
                    node distance = 1cm, 
                    auto]
    \node [block] (1st) {1st};
    \node [block, right= of 1st]  (2nd1) {2nd1};
\begin{scope}[node distance=2mm and 10mm]%Here we change it for everything inside this scope
    \node [block, above= of 2nd1] (2nd2) {2nd2};
    \node [block, below= of 2nd1] (2nd3) {2nd3};
    \node [block, right= of 2nd1] (3rd1) {3rd1};
    \node [block, above= of 3rd1] (3rd2) {3rd2};
    \node [block, above= of 3rd2] (3rd3) {3rd3};
\end{scope}
    \node [block, below= of 3rd1] (3rd4) {3rd4};
    \node [block, below= of 3rd4] (3rd5) {3rd5};

    \path [line] (1st) -- (2nd1);
    \path [line] (2nd1) -- (2nd2);
    \path [line] (2nd1) -- (2nd3);
    \path [line] (2nd2) -- (3rd3);
    \path [line] (2nd1) -- (3rd1);
    \path [line] (1st) -- (2nd1);
\end{tikzpicture}
\end{document}

enter image description here

[Tex/LaTex] TikZ/ERD: node (=Entity) label on the inside

I guess this is one way of doing it:

\documentclass[tikz,border=5]{standalone}

\usetikzlibrary{matrix}
\begin{document}
\tikzset{
    entity/.code={
        \tikzset{
            rounded corners,             
            name=#1,
            inner sep=2pt,
            every entity/.try,
        }%
        \def\entityname{#1}%
    },
    entity anchor/.style={matrix anchor=#1},
    every entity/.style={
            draw,
    },
    every property/.style={
        inner xsep=0.20cm, inner ysep=0.075cm, anchor=west, text width=1.75in
    }
}
\def\property#1{\node[name=\entityname-#1, every property/.try]{\propertysplit#1;};}
\def\properties{\begingroup\catcode`\_=11\relax\processproperties}
\def\processproperties#1{\endgroup%
    \gdef\propertycode{}%
    \foreach \p in {#1}{%
        \expandafter\expandafter\expandafter\gdef\expandafter\expandafter\expandafter\propertycode%
            \expandafter\expandafter\expandafter{\expandafter\propertycode\expandafter\property\expandafter{\p}\\}%
    }%
    \propertycode%
}
\def\propertysplit#1:#2;{#1:\hfill#2}

\def\entitynamenode{%
\node[every entity name/.try] (\entityname-name) {\entityname};
\draw (\entityname-name.south west) -- (\entityname-name.south east);
\\[1ex]
}
\tikzset{
  every entity name/.style={every property/.try, align=center}
}

\begin{tikzpicture}[every node/.style={font=\ttfamily}, node distance=0.5in]
\matrix [entity=Employee] {
    \entitynamenode
    \properties{
        Username :  varchar(255),
        Password :  varchar(255),        
        Name :  varchar(255),
        LastName :  varchar(255)
    }
};
\end{tikzpicture}   

\end{document}

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] How to define the default vertical distance between nodes

[Tex/LaTex] TikZ/ERD: node (=Entity) label on the inside

Related Question