\documentclass[a4paper,12pt]{article}
\usepackage[margin=1cm]{geometry}
\usepackage{pstricks}
\begin{document}
\psset{unit=1cm,gridlabels=7pt}% default value
\noindent\fboxsep=0pt
L
\hrulefill
\fbox{\begin{pspicture}(-1,-1)(1,2)
  \psgrid
\end{pspicture}}%
\hrulefill
\fbox{\begin{pspicture}[shift=-1](-1,-1)(1,2)
  \psgrid
\end{pspicture}}%
\hrulefill
\fbox{\begin{pspicture}[shift=-3cm](-1,-1)(1,2)
  \psgrid
\end{pspicture}}%
\hrulefill
\fbox{\begin{pspicture}[shift=1.5](-1,-1)(1,2)
  \psgrid
\end{pspicture}}%
\hrulefill
\raisebox{0.5\height}{\fbox{\begin{pspicture}(-1,-1)(1,2)
  \psgrid
\end{pspicture}}}%
\hrulefill
R
\end{document}