\documentclass[a4paper]{article} % From Michael Sharpe \usepackage{pstricks} \SpecialCoor \usepackage{pst-plot} \pagestyle{empty} \begin{document} \newcommand\drawseg[2]{% \pscustom[linecolor=red]{% \translate(#1,#2) \rotate{(#2,#1)} % Vector in direction of field at x=#1,y=#2 \psline(-.25,0)(.25,0)}} \begin{pspicture}(-6,-6)(6,6) \psset{arrows=->} \psaxes[linestyle=dashed,linewidth=0.1pt,arrowscale=3](0,0)(-6,-6)(6,6) \multido{\n=-5+1}{11}{% \multido{\N=-5+1}{11}{% \ifnum\N=0 \ifnum\n=0 \else\drawseg{\n}{\N}\fi \else \drawseg{\n}{\N} \fi}} \end{pspicture} \end{document}