Can you help a little more?
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%!TEX xelatex
\documentclass[12pt]{article}
\usepackage{pgf}
\usepackage{tikz}
\usetikzlibrary{arrows,automata}
\usepackage{pgfplots}
\usepackage{pstricks,pst-plot}
\begin{document}
\begin{figure}[htb]
\begin{centering}
\begin{pspicture}
\psaxes[ticks=none,xunit=.5cm] (0,0)(0,10)(30,0)
\psdots[dotstyle=Oplus,dotsize=10pt] (1,1)(2,2)(-1,3)(-3,5)
\psline {->}(1,1)(13,1)
\psline(15,0)(15,10)
\psline {->}(2,2)(16,2)
\psline{->}(-1,3)(8,3)
\psline{->}(-3,5)(17,5)
\end{pspicture}
\end{centering}
\caption{censoring observed}
\end{figure}
\end{document}