345 \item Define a function as below

   345 \item Define a function as below

   346 \end{itemize}

   346 \end{itemize}

   347 \begin{lstlisting}

   347 \begin{lstlisting}

   348 In []: def pend_int(initial, t):

   348 In []: def pend_int(initial, t):

   349   ....     theta, omega = initial

   349   ....     theta, omega = initial

   351   ....     f=[omega, -(g/L)*sin(theta)]

   351   ....     f=[omega, -(g/L)*sin(theta)]

   352   ....     return f

   352   ....     return f

   353   ....

   353   ....

   354 \end{lstlisting}

   354 \end{lstlisting}

   355 \end{frame}

   355 \end{frame}