%% 
%%  A DANTE-Edition example
%% 
%%  Example 23-05-43 on page 381.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks,pst-3dplot}

\begin{document}
\begin{pspicture}(-1,-1)(4,4)
 \pstThreeDCoor[xMin=-4,xMax=1,yMax=2,zMax=4]
 \psset{arrows=->,arrowsize=0.2,
    linecolor=blue,linewidth=1.5pt}
 \pstThreeDLine[linecolor=green](0,0,0)(-2,2,3)
 \uput[45](1.5,1){$\vec{o}$}
 \pstThreeDLine(-2,2,3)(2,2,3)
 \uput[0](3,2){$\vec{u}$}
 \pstThreeDLine(-2,2,3)(-2,3,3)
 \uput[180](1,2){$\vec{v}$}
\end{pspicture}
\end{document}