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i'm using tikzpicture and pgfplots to make my plots and i'm currently facing a problem when i use a function like 2/x

\begin{center}
\begin{tikzpicture}
    \begin{axis}[ ymin=-10, ymax=10, xmin=-10, xmax=10, axis lines=middle, xlabel = $x$ , ylabel = $y$]
        \addplot[dashed, color=red]{ (2)/(x) };
    \end{axis}
\end{tikzpicture}
\end{center}

It gives me multiple errors like: dimension too large and arithmetic overflow, anyone knows how to fix it?

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  • 1
    you must restrict the domain to avoid that you divide by zero (or nearly zero). See section 4.22 Skipping Or Changing Coordinates in the pgfplots documentation.
    – Ulrike Fischer
    Oct 19, 2022 at 14:09

1 Answer 1

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You need to 'jump' over the singularity in x=0 whit 2 domains:

\addplot[dashed, color=red,domain =-10:-.1]{ (2)/(x) };
\addplot[dashed, color=red,domain =0.1:10]{ (2)/(x) };

So the output is:

enter image description here

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