Integration methods in the xMat
By default, the following explicit Runge-Kutta methods are provided:
  1. Eul-Exp: Explicit Euler,
  2. Richard: Explicit Euler with Richardson extrapolation,
  3. RK-S 23: Simpson rule (Runge-Kutta 2/3),
  4. RK-BS23: Bogacki-Shampine (Runge-Kutta 2/3),
  5. RK-F 45: Runge-Kutta-Fehlberg (4/5),
  6. RK-CK45: Cash-Karp (Runge Kutta 4/5), and
  7. RK-DP45: Dormand-Prince (Runge Kutta 4/5)
To select an integration scheme, edit the line
character(len=7), parameter :: setting_solver_default = 'Eul-Exp'
in the module General_Settings of the xMat. Replace Eul-Exp with the identifier of the integration method of your choice.