draw a rectangle with a solid dot in each corner

Question

I want to draw a rectangle with a solid dot in each corner. How can I do this?

Answer 1

This is to give a variant from Marco's answer, concerning the Tikz part of his answer. It looks more like the pstricks answer and does not require that you enter the coordinates twice.

The code is

\documentclass[border=5pt]{standalone}

\usepackage{tikz}

\begin{document}
\begin{tikzpicture}

\draw plot[mark=*,mark size = 1pt,mark options={color=red}] coordinates {(0,0)(1,0)(1,1)(0,1)} -- cycle; 

\end{tikzpicture}
\end{document}

plot will give straight lines segments if you don't ask for a smooth plot from coordinates.

The result is

Answer 2

To draw inside LaTeX you can use the package tikz or pstricks. Both packages have their drawbacks and benefits.

PSTricks:

Compile the following example with xelatex or latex-ps-pdf

\documentclass{article}
\usepackage{pstricks}
\begin{document}
\begin{pspicture}(0,0)(4,4)
\psline[showpoints=true](1,1)(3,1)(3,3)(1,3)(1,1)
\end{pspicture}
\end{document}

You get the result:

TikZ

Compile with pdflatex:

\documentclass{standalone}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\path (0,0) rectangle (4,4);
\draw (1,1) rectangle(3,3);
\foreach \x/\y in {1/1,3/1,3/3,1/3}
 \fill (\x,\y) circle (2pt);
\end{tikzpicture}
\end{document}

You get:

Answer 3

\documentclass{scrartcl}
\usepackage{tikz}
\begin{document} 

\tikzset{add reference/.style={insert path={%
    coordinate [pos=0] (#1sw) 
    coordinate [pos=1] (#1ne)                     
    (#1sw |- #1ne)  coordinate (#1nw)
    (#1sw -| #1ne)  coordinate (#1se) 
}}}  

\tikzset{pt/.style={circle,fill=#1,inner sep=0mm,minimum size=4pt}}  

\begin{tikzpicture} 
\draw (0,0) rectangle (4,4) [add reference=R];
\foreach \c in {sw,se,nw,ne}{ \path  (R\c) coordinate[pt=red] ;}
\end{tikzpicture}
\end{document}