Argthtjtr

In my presentation, I need to put two graphs under a list item. I am trying the following code but am getting an error stating that "Missing number, treated as zero. end{frame}". If I remove this piece of code, it works fine. The piece of code is;

begin{frame}[t]{Simulation Results & Observations}

begin{itemize}

    item NCMSE based analysis of SiT-OMP & SiT-CoSaMP with variations in Sparsity (S)

end{itemize}

begin{columns}

    begin{column}{width=0.5textwidth}

        Here is something.

    end{column}

    begin{column}{width=0.5textwidth}

        Here is something.

    end{column}

end{columns}

end{frame}

The culprit is width= in begin{column}{width=0.5textwidth}.

documentclass{beamer}

begin{document}

begin{frame}[t]{Simulation Results & Observations}

begin{itemize}

    item NCMSE based analysis of SiT-OMP & SiT-CoSaMP with variations in Sparsity (S)

end{itemize}

begin{columns}

    begin{column}{0.48textwidth}

        Here is something.

    end{column}

    begin{column}{0.48textwidth}

        Here is something.

    end{column}

end{columns}

end{frame}

end{document}

EDIT: Decreased the width a tiny bit to prevent the second row from running over the frame. Big thanks to @samcarter!