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Code, edit and compile here:
%!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}