# cvode_with_disc.py¶

assimulo.examples.cvode_with_disc.run_example(with_plots=True)[source]

Example of the use of CVode for a differential equation with a iscontinuity (state event) and the need for an event iteration.

on return:

• exp_mod problem instance
• exp_sim solver instance

No initialization defined for the problem.
A discontinuity occured at t = 1.000000e+00.
Current switches: [False, True, True]
Event info: [[0, 0, -1], False]
Final Run Statistics: ODE with discontinuities and a function with consistency problem

Number of steps                                 : 6
Number of function evaluations                  : 10
Number of Jacobian evaluations                  : 1
Number of function eval. due to Jacobian eval.  : 3
Number of error test failures                   : 0
Number of nonlinear iterations                  : 6
Number of nonlinear convergence failures        : 0
Number of state function evaluations            : 8
Number of state events                          : 1

Solver options:

Solver                   : CVode
Linear multistep method  : BDF
Nonlinear solver         : Newton
Linear solver type       : DENSE
Maximal order            : 5
Tolerances (absolute)    : 1e-06
Tolerances (relative)    : 1e-06

No finalization defined for the problem.
Final Run Statistics: ODE with discontinuities and a function with consistency problem

Number of steps                                 : 10
Number of function evaluations                  : 18
Number of Jacobian evaluations                  : 2
Number of function eval. due to Jacobian eval.  : 6
Number of error test failures                   : 0
Number of nonlinear iterations                  : 10
Number of nonlinear convergence failures        : 0
Number of state function evaluations            : 14
Number of state events                          : 1

Solver options:

Solver                   : CVode
Linear multistep method  : BDF
Nonlinear solver         : Newton
Linear solver type       : DENSE
Maximal order            : 5
Tolerances (absolute)    : 1e-06
Tolerances (relative)    : 1e-06

Simulation interval    : 0.0 - 10.0 seconds.
Elapsed simulation time: 0.010479927063 seconds.
Time, t = 1.000000e+00
Event info,  [[0, 0, -1], False]
Number of events:  1


Note

Press [source] (to the top right) to view the example.