def _prepare_simulator_from_view_model(self, view_model):
simulator = Simulator()
simulator.gid = view_model.gid
conn = self.load_traited_by_gid(view_model.connectivity)
simulator.connectivity = conn
simulator.conduction_speed = view_model.conduction_speed
simulator.coupling = view_model.coupling
rm_surface = None
if view_model.surface:
simulator.surface = Cortex()
rm_index = self.load_entity_by_gid(
view_model.surface.region_mapping_data.hex)
rm = h5.load_from_index(rm_index)
rm_surface_index = self.load_entity_by_gid(rm_index.fk_surface_gid)
rm_surface = h5.load_from_index(rm_surface_index, CorticalSurface)
rm.surface = rm_surface
rm.connectivity = conn
simulator.surface.region_mapping_data = rm
if simulator.surface.local_connectivity:
lc = self.load_traited_by_gid(
view_model.surface.local_connectivity)
assert lc.surface.gid == rm_index.fk_surface_gid
lc.surface = rm_surface
simulator.surface.local_connectivity = lc
if view_model.stimulus:
stimulus_index = self.load_entity_by_gid(view_model.stimulus.hex)
stimulus = h5.load_from_index(stimulus_index)
simulator.stimulus = stimulus
if isinstance(stimulus, StimuliSurface):
simulator.stimulus.surface = rm_surface
else:
simulator.stimulus.connectivity = simulator.connectivity
simulator.model = view_model.model
simulator.integrator = view_model.integrator
simulator.initial_conditions = view_model.initial_conditions
simulator.monitors = view_model.monitors
simulator.simulation_length = view_model.simulation_length
# TODO: why not load history here?
# if view_model.history:
# history_index = dao.get_datatype_by_gid(view_model.history.hex)
# history = h5.load_from_index(history_index)
# assert isinstance(history, SimulationHistory)
# history.fill_into(self.algorithm)
return simulator
def build(self, **model_params):
# Load, normalize and configure connectivity
if isinstance(self.connectivity, string_types):
connectivity = Connectivity.from_file(self.connectivity)
else:
connectivity = self.connectivity
if self.scale_connectivity_weights is not None:
if isinstance(self.scale_connectivity_weights, string_types):
connectivity.weights = connectivity.scaled_weights(
mode=self.scale_connectivity_weights)
else:
connectivity.weights /= self.scale_connectivity_weights
if not self.delays_flag:
connectivity.configure() # to set speed
# Given that
# idelays = numpy.rint(delays / dt).astype(numpy.int32)
# and delays = tract_lengths / speed
connectivity.tract_lengths = 0.1 * self.dt * connectivity.speed
connectivity.configure()
# Build model:
model = self.model(**model_params)
# Build integrator
integrator = self.integrator(dt=self.dt)
integrator.noise.nsig = np.array(ensure_list(self.noise_strength))
# Build monitors:
assert Raw in self.monitors
monitors = []
for monitor in self.monitors:
monitors.append(monitor(period=self.dt))
monitors = tuple(monitors)
# Build simulator
simulator = Simulator()
simulator._config = self.config
simulator.connectivity = connectivity
simulator.model = model
simulator.integrator = integrator
simulator.monitors = monitors
return simulator
def main_example(tvb_sim_model,
connectivity_zip=CONFIGURED.DEFAULT_CONNECTIVITY_ZIP,
dt=0.1,
noise_strength=0.001,
simulation_length=100.0,
config=CONFIGURED):
plotter = Plotter(config)
# --------------------------------------1. Load TVB connectivity----------------------------------------------------
connectivity = Connectivity.from_file(connectivity_zip)
connectivity.configure()
plotter.plot_tvb_connectivity(connectivity)
# ----------------------2. Define a TVB simulator (model, integrator, monitors...)----------------------------------
# Create a TVB simulator and set all desired inputs
# (connectivity, model, surface, stimuli etc)
# We choose all defaults in this example
simulator = Simulator()
simulator.integrator = HeunStochastic(dt=dt)
simulator.integrator.noise.nsig = np.array(ensure_list(noise_strength))
simulator.model = tvb_sim_model
simulator.connectivity = connectivity
mon_raw = Raw(period=simulator.integrator.dt)
simulator.monitors = (mon_raw, )
# -----------------------------------3. Simulate and gather results-------------------------------------------------
# Configure the simulator with the TVB-NEST interface...
# simulator.configure(tvb_nest_interface=tvb_nest_model)
simulator.configure()
# ...and simulate!
t_start = time.time()
results = simulator.run(simulation_length=simulation_length)
print("\nSimulated in %f secs!" % (time.time() - t_start))
# -------------------------------------------6. Plot results--------------------------------------------------------
plot_results(results, simulator, None, "State Variables",
simulator.model.variables_of_interest, plotter)
return connectivity, results
