[Tex/LaTex] Draw Vertices of Regular Polygon

asymptotediagramspstrickstikz-pgf

I am trying to draw just the nodes (no sides) at the vertices of a regular hexagon. This answer should be easily modified to accomplish what I want, but I am such a novice that I have difficulty understanding the example. Ideally, each vertex would be a separate named node so that I can easily draw edges between them (I will be making several different graphs using these same nodes).

Best Answer

You can use the regular polygon shape from the shapes.geometric library, setting draw=none. Giving the node the name a, the vertices will be named a.corner 1, a.corner 2 etc.

\documentclass[border=2mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes.geometric}
\begin{document}

\begin{tikzpicture}
% create the node
\node[draw=none,minimum size=2cm,regular polygon,regular polygon sides=6] (a) {};

% draw a black dot in each vertex
\foreach \x in {1,2,...,6}
  \fill (a.corner \x) circle[radius=2pt];

\end{tikzpicture}
\end{document}

Related Solutions

[Tex/LaTex] TiKZ node name prefixes in scopes

Here's a simple hack that redefines the naming code inside the scope to append a prefix. You can't use a . as a separator though as that would confuse the parser. I've used a space, but you could use something else (some punctuation, such as . is special, there's a list somewhere here).

\documentclass{article}
%\url{http://tex.stackexchange.com/q/128049/86}

\usepackage{tikz}

\begin{document}

\tikzstyle{vertex}=[circle,draw,fill=black!20]

\makeatletter
\tikzset{%
  prefix node name/.code={%
    \tikzset{%
      name/.code={\edef\tikz@fig@name{#1 ##1}}
    }%
  }%
}
\makeatother

\begin{tikzpicture}

% ---- Copy 1
\begin{scope}[yshift=-32pt,prefix node name=G1]
  \node[vertex] (u) at (0, 0) {u};
  \node[vertex] (v) at (0, 0) {v};
\end{scope}

% ---- Copy 2
\begin{scope}[yshift=32pt,prefix node name=G2]
  \node[vertex] (u) at (0, 0) {u};
  \node[vertex] (v) at (0, 0) {v};
\end{scope}

\draw (G1 u) -- (G2 v);

\end{tikzpicture}

\end{document}

Note that this works both with implicit and explicit naming of nodes (ie via name=<name> and \node (name) ...).

[Tex/LaTex] How to label TikZ-graphs on four vertices with a loop

You can do that with two loops: one running from 1 to n-1, the other from the current value of the first to n. Here an example for six:

Code

\documentclass[tikz,convert=false]{standalone}

\begin{document}

\begin{tikzpicture}[scale=.5,auto=left,every node/.style={circle,fill=black!20}]  
        \foreach \x in {1,...,6}
        {   \node (n\x) at (\x*60:3) {\x};
        }
    \foreach \x in {1,...,5}
    {   \pgfmathtruncatemacro{\lowerbound}{\x+1}
        \foreach \y in {\lowerbound,...,6}
        {   \draw (n\x) -- (n\y);
            % for labelled edges
            %\draw (n\x) -- (n\y) node[sloped,pos=0.39,fill=white,fill opacity=0.3,above=0.1mm,rectangle, inner sep=0.1mm] {\tiny \x-\y};
        }
    }

\end{tikzpicture}

\end{document}

Output

enter image description here

Output with labels

enter image description here

Bonus homework: adapted for 36 nodes

enter image description here

Best Answer

Related Solutions

[Tex/LaTex] TiKZ node name prefixes in scopes

[Tex/LaTex] How to label TikZ-graphs on four vertices with a loop

Code

Output

Output with labels

Bonus homework: adapted for 36 nodes

Related Question