خط محتوای دستور \clip را حذف نمایید.
با دستور \centerline محتویات تصویر را در وسط صفحه قرار دهید.
در صورتیکه اندازه تصویر را مناسب نمییابید میتوانید با گزینه scale آن را تغییر اندازه دهید.
\centerline{
\begin{tikzpicture}[scale=.7]
%\clip(-12.232332388343176,-4.1739418674784) rectangle (49.11202363768212,12.657624349841091);
\draw [->,line width=2.8pt] (-6.,0.) -- (-6.,-2.);
\draw [->,line width=2.8pt] (0.,0.) -- (-6.,-2.);
\draw [->,line width=0.8pt] (-6.,0.) -- (0.,2.);
\draw [->,line width=2.8pt] (0.,2.) -- (6.,0.);
\draw [->,line width=0.8pt] (0.,0.) -- (6.,-2.);
\draw [->,line width=0.8pt] (-6.,-2.) -- (6.,-2.);
\draw [->,line width=0.8pt] (6.,0.) -- (6.,-2.);
\draw [->,line width=2.8pt] (0.,2.) -- (0.,0.);
\draw (-7.143022851369226,-0.450144031788247) node[anchor=north west] {16};
\draw (-3.3260406986387623,-0.21182097030407726) node[anchor=north west] {23};
\draw (-1.1449080399356406,1.3968596947140688) node[anchor=north west] {55};
\draw (2.399432530456932,2.1416192618520995) node[anchor=north west] {04};
\begin{scriptsize}
\draw [fill=black] (-6.,0.) circle (1.5pt);
\draw[color=black] (-6.438698763663009,0.7116808929470807) node {$x_1$};
\draw [fill=black] (-6.,-2.) circle (1.5pt);
\draw[color=black] (-6.575019554831954,-2.0886150794919143) node {$v_1$};
\draw [fill=black] (0.,0.) circle (1.5pt);
\draw[color=black] (0.6499823771221366,0.4435674487773897) node {$v_2$};
\draw [fill=black] (0.,2.) circle (1.5pt);
\draw[color=black] (0.42278105850722814,2.8565884463046087) node {$v_3$};
\draw [fill=black] (6.,0.) circle (1.5pt);
\draw[color=black] (6.8298582434476485,0.622309744890517) node {$y_1$};
\draw [fill=black] (6.,-2.) circle (1.5pt);
\draw[color=black] (6.557216661109758,-2.0886150794919143) node {$v_5$};
\end{scriptsize}
\end{tikzpicture}
}
