def run_example(with_plots=True):
"""
Example of the use of CVode for a differential equation
with a iscontinuity (state event) and the need for an event iteration.
on return:
- :dfn:`exp_mod` problem instance
- :dfn:`exp_sim` solver instance
"""
#Create an instance of the problem
exp_mod = Extended_Problem() #Create the problem
exp_sim = CVode(exp_mod) #Create the solver
exp_sim.verbosity = 0
exp_sim.report_continuously = True
#Simulate
t, y = exp_sim.simulate(
10.0, 1000) #Simulate 10 seconds with 1000 communications points
exp_sim.print_event_data()
#Plot
if with_plots:
import pylab as P
P.plot(t, y)
P.title(exp_mod.name)
P.ylabel('States')
P.xlabel('Time')
P.show()
#Basic test
nose.tools.assert_almost_equal(y[-1][0], 8.0)
nose.tools.assert_almost_equal(y[-1][1], 3.0)
nose.tools.assert_almost_equal(y[-1][2], 2.0)
return exp_mod, exp_sim
