def test_parallel_experiment(self):
"""
Test running an experiment in parallel
Returns
-------
"""
from ema_workbench.connectors import PySDConnector
model = PySDConnector('../models/Teacup.mdl',
uncertainties_dict={'Room Temperature': (33, 120)},
outcomes_list=['Teacup Temperature'])
ensemble = ModelEnsemble() # instantiate an ensemble
ensemble.model_structure = model # set the model on the ensemble
ensemble.parallel = True
results = ensemble.perform_experiments(cases=20)
def test_add_outcomes(self):
from ema_workbench.connectors import PySDConnector
model = PySDConnector('../models/Teacup.mdl',
uncertainties_dict={'Room Temperature': (33, 120)},
outcomes_list=['Teacup Temperature'])
ensemble = ModelEnsemble() # instantiate an ensemble
ensemble.model_structure = model # set the model on the ensemble
ensemble.parallel = False
nr_runs = 10
experiments, outcomes = ensemble.perform_experiments(nr_runs)
self.assertEqual(experiments.shape[0], nr_runs)
self.assertIn('TIME', outcomes.keys())
self.assertIn('Teacup Temperature', outcomes.keys())
def test_vensim_model(self):
#instantiate a model
wd = r'../models'
model = VensimExampleModel(wd, "simpleModel")
#instantiate an ensemble
ensemble = ModelEnsemble()
#set the model on the ensemble
ensemble.model_structure = model
nr_runs = 10
experiments, outcomes = ensemble.perform_experiments(nr_runs)
self.assertEqual(experiments.shape[0], nr_runs)
self.assertIn('TIME', outcomes.keys())
self.assertIn(model.outcomes[0].name, outcomes.keys())
def test_running_lookup_uncertainties(self):
'''
This is the more comprehensive test, given that the lookup
uncertainty replaces itself with a bunch of other uncertainties, check
whether we can successfully run a set of experiments and get results
back. We assert that the uncertainties are correctly replaced by
analyzing the experiments array.
'''
if os.name != 'nt':
return
model = LookupTestModel( r'../models/', 'lookupTestModel')
#model.step = 4 #reduce data to be stored
ensemble = ModelEnsemble()
ensemble.model_structure = model
ensemble.perform_experiments(10)
def test_optimization():
if os.name != 'nt':
return
ema_logging.log_to_stderr(ema_logging.INFO)
model = FluModel(r'../models', "fluCase")
ensemble = ModelEnsemble()
ensemble.model_structure = model
ensemble.parallel=True
pop_size = 8
nr_of_generations = 10
eps = np.array([1e-3, 1e6])
stats, pop = ensemble.perform_outcome_optimization(obj_function = obj_function_multi,
algorithm=epsNSGA2,
reporting_interval=100,
weights=(MAXIMIZE, MAXIMIZE),
pop_size=pop_size,
nr_of_generations=nr_of_generations,
crossover_rate=0.8,
mutation_rate=0.05,
eps=eps)
"susceptible to immune population delay time region 1"),
ParameterUncertainty((0.5,2),
"susceptible to immune population delay time region 2"),
ParameterUncertainty((0.01, 5),
"root contact rate region 1"),
ParameterUncertainty((0.01, 5),
"root contact ratio region 2"),
ParameterUncertainty((0, 0.15),
"infection ratio region 1"),
ParameterUncertainty((0, 0.15),
"infection rate region 2"),
ParameterUncertainty((10, 100),
"normal contact rate region 1"),
ParameterUncertainty((10, 200),
"normal contact rate region 2")]
if __name__ == "__main__":
ema_logging.log_to_stderr(ema_logging.INFO)
model = FluModel(r'./models/flu', "fluCase")
ensemble = ModelEnsemble()
ensemble.model_structure = model
ensemble.parallel = True #turn on parallel processing
nr_experiments = 1000
results = ensemble.perform_experiments(nr_experiments)
fh = r'./data/{} flu cases no policy.tar.gz'.format(nr_experiments)
save_results(results, fh)
susceptible_population_region_2 = susceptible_population_region_2_NEXT
immune_population_region_1 = immune_population_region_1_NEXT
immune_population_region_2 = immune_population_region_2_NEXT
deceased_population_region_1.append(deceased_population_region_1_NEXT)
deceased_population_region_2.append(deceased_population_region_2_NEXT)
#End of main code
return (runTime, deceased_population_region_1) #, Max_infected, Max_time)
if __name__ == "__main__":
np.random.seed(150) #set the seed for replication purposes
ema_logging.log_to_stderr(ema_logging.INFO)
fluModel = MexicanFlu(None, "mexicanFluExample")
ensemble = ModelEnsemble()
ensemble.parallel = True
ensemble.model_structure = fluModel
nr_experiments = 500
results = ensemble.perform_experiments(nr_experiments, reporting_interval=100)
lines(results, outcomes_to_show="deceased_population_region_1",
show_envelope=True, density=KDE, titles=None,
experiments_to_show=np.arange(0, nr_experiments, 10)
)
plt.show()
Python directly
'''
#specify uncertainties
uncertainties = [ParameterUncertainty((0.1, 10), "x1"),
ParameterUncertainty((-0.01,0.01), "x2"),
ParameterUncertainty((-0.01,0.01), "x3")]
#specify outcomes
outcomes = [Outcome('y')]
def model_init(self, policy, kwargs):
pass
def run_model(self, case):
"""Method for running an instantiated model structure """
self.output[self.outcomes[0].name] = case['x1']*case['x2']+case['x3']
if __name__ == '__main__':
ema_logging.LOG_FORMAT = '[%(name)s/%(levelname)s/%(processName)s] %(message)s'
ema_logging.log_to_stderr(ema_logging.INFO)
model = SimplePythonModel(None, 'simpleModel') #instantiate the model
ensemble = ModelEnsemble() #instantiate an ensemble
ensemble.parallel = True
ensemble.model_structure = model #set the model on the ensemble
results = ensemble.perform_experiments(1000, reporting_interval=1) #run 1000 experiments
#note that this reference to the model should be relative
#this relative path will be combined with the workingDirectory
model_file = r'\model.vpm'
#specify outcomes
outcomes = [Outcome('a', time=True)]
#specify your uncertainties
uncertainties = [ParameterUncertainty((0, 2.5), "x11"),
ParameterUncertainty((-2.5, 2.5), "x12")]
if __name__ == "__main__":
#turn on logging
ema_logging.log_to_stderr(ema_logging.INFO)
#instantiate a model
wd = r'./models/vensim example'
vensimModel = VensimExampleModel(wd, "simpleModel")
#instantiate an ensemble
ensemble = ModelEnsemble()
#set the model on the ensemble
ensemble.model_structure = vensimModel
#run in parallel, if not set, FALSE is assumed
ensemble.parallel = True
#perform experiments
result = ensemble.perform_experiments(1000)
