pendulum_double_ode, an Octave code which defines the double pendulum ordinary differential equation (ODE).
The information on this web page is distributed under the MIT license.
pendulum_double_ode is available in a MATLAB version and an Octave version and a Python version and
octave_ode, an Octave code which sets up various ordinary differential equations (ODE).
Original MATLAB version by Alexander Erlich. This version by John Burkardt.