Index of /grad/509/src_numerics/ODE/1

      Name                    Last modified       Size  Description


[DIR] Parent Directory        22-Apr-2011 13:27      -  
[TXT] Makefile                22-Apr-2011 13:28     1k  
[TXT] ode0.cc                 22-Apr-2011 13:28     3k  
[TXT] ode1.cc                 22-Apr-2011 13:28    11k  
[DIR] old/                    22-Apr-2011 13:28      -  

This simple example on solving ordinary differential equations tests
Runke-Kutta method with fixed step size and variable step size by
solving "simple pendulum" problem.

It starts pendulum with energy equal E=1 and initial nonzero velocity and
zero position. Time evolution of 200 time-units with time-step of 0.1 is
monitored and the error is printed as well as the energy of the system versus
time. Energy is constantly decreasing - a signature of the degradation.