def test_against_cvode_v_independent(self):
# Test with v-independent states
model = myokit.parse_model(MODEL)
model.get('membrane.V').set_rhs(-80)
model.get('membrane.V').demote()
model.binding('pace').set_binding(None)
model.get('membrane.V').set_binding('pace')
# Create a protocol
vs = [-30, -20, -10]
p = myokit.pacing.steptrain(vsteps=vs,
vhold=-120,
tpre=8,
tstep=2,
tpost=0)
t = p.characteristic_time()
# Run an analytical simulation
dt = 0.01
m = hh.HHModel.from_component(model.get('binding'))
s1 = hh.AnalyticalSimulation(m, p)
d1 = s1.run(t, log_interval=dt).npview()
s2 = myokit.Simulation(model, p)
s2.set_tolerance(1e-8, 1e-8)
d2 = s2.run(t, log_interval=dt).npview()
# Test protocol output is the same
e = np.abs(d1['membrane.V'] - d2['membrane.V'])
self.assertEqual(np.max(e), 0)
# Test current output is very similar
e = np.abs(d1['binding.I'] - d2['binding.I'])
self.assertLess(np.max(e), 2e-4)
def test_against_cvode(self):
# Validate against a cvode sim.
# Get a model
fname = os.path.join(DIR_DATA, 'lr-1991-fitting.mmt')
model = myokit.load_model(fname)
model.get('membrane.V').set_binding('pace')
# Create a protocol
vs = [-30, -20, -10]
p = myokit.pacing.steptrain(vsteps=vs,
vhold=-120,
tpre=8,
tstep=2,
tpost=0)
t = p.characteristic_time()
# Run an analytical simulation
dt = 0.01
m = hh.HHModel.from_component(model.get('ina'))
s1 = hh.AnalyticalSimulation(m, p)
d1 = s1.run(t, log_interval=dt).npview()
s2 = myokit.Simulation(model, p)
s2.set_tolerance(1e-8, 1e-8)
d2 = s2.run(t, log_interval=dt).npview()
# Test protocol output is the same
e = np.abs(d1['membrane.V'] - d2['membrane.V'])
self.assertEqual(np.max(e), 0)
# Test current output is very similar
e = np.abs(d1['ina.INa'] - d2['ina.INa'])
self.assertLess(np.max(e), 2e-4)
def test_analytical_simulation_properties(self):
# Test basic get/set methods of analytical simulation.
# Create a simulation
fname = os.path.join(DIR_DATA, 'lr-1991-fitting.mmt')
model = myokit.load_model(fname)
m = hh.HHModel.from_component(model.get('ina'))
s = hh.AnalyticalSimulation(m)
# membrane potential
self.assertEqual(s.membrane_potential(),
model.get('membrane.V').eval())
s.set_membrane_potential(10)
self.assertEqual(s.membrane_potential(), 10)
# Parameter values
p = list(range(len(s.parameters())))
self.assertNotEqual(p, s.parameters())
s.set_parameters(p)
self.assertEqual(p, s.parameters())
self.assertRaises(ValueError, s.set_parameters, p[:-1])
# Change parameter with set_constant
p[3] += 1
self.assertNotEqual(p, s.parameters())
s.set_constant(m.parameters()[3], p[3])
self.assertEqual(p, s.parameters())
# State
state = np.zeros(len(s.state()))
state[0] = 0.3
state[1] = 0.5
self.assertNotEqual(list(state), list(s.state()))
s.set_state(state)
self.assertEqual(list(state), list(s.state()))
self.assertRaisesRegex(ValueError, 'Wrong size', s.set_state,
state[:-1])
state[0] = -.1
self.assertRaisesRegex(ValueError, 'must be in the range', s.set_state,
state)
state[0] = 0
state[1] = 1.1
self.assertRaisesRegex(ValueError, 'must be in the range', s.set_state,
state)
# Default state
dstate = np.zeros(len(s.default_state()))
dstate[0] = 0.3
dstate[1] = 0.5
self.assertNotEqual(list(dstate), list(s.default_state()))
s.set_default_state(dstate)
self.assertEqual(list(dstate), list(s.default_state()))
self.assertRaisesRegex(ValueError, 'Wrong size', s.set_default_state,
dstate[:-1])
dstate[0] = -.1
self.assertRaisesRegex(ValueError, 'must be in the range',
s.set_default_state, dstate)
state[0] = 0
state[1] = 1.1
self.assertRaisesRegex(ValueError, 'must be in the range',
s.set_default_state, dstate)
def test_create_and_run(self):
# Test creating and running a simulation
# Create a simulation
fname = os.path.join(DIR_DATA, 'lr-1991-fitting.mmt')
model = myokit.load_model(fname)
m = hh.HHModel.from_component(model.get('ina'))
# Bad constructors
self.assertRaisesRegex(ValueError, 'HHModel', hh.AnalyticalSimulation,
1)
self.assertRaisesRegex(ValueError, 'Protocol', hh.AnalyticalSimulation,
m, 1)
# Create properly
s = hh.AnalyticalSimulation(m)
# Times to evaluate at
times = np.linspace(0, 100, 5)
# Voltages to test at
voltages = np.arange(-70, 0, 30)
# Generate traces with "solve" method
state = s.state()
dstate = s.default_state()
for v in voltages:
s.set_membrane_potential(v)
x, i = s.solve(times)
# Solve shouldn't change the state
self.assertEqual(state, s.state())
self.assertEqual(dstate, s.default_state())
# Run for a bit
self.assertIsInstance(s.run(10), myokit.DataLog)
# Run can append to log
d = s.run(10)
n = len(d['engine.time'])
e = s.run(1, log=d)
self.assertIs(d, e)
self.assertTrue(len(d['engine.time']) > n)
# Run for zero duration
d = s.run(0)
self.assertEqual(len(d.time()), 0)
d = s.run(0)
self.assertEqual(len(d.time()), 0)
# No current variable? Then current can't be calculated
model2 = model.clone()
model2.get('ina').remove_variable(model2.get('ina.INa'))
m2 = hh.HHModel.from_component(model2.get('ina'))
s2 = hh.AnalyticalSimulation(m2)
# But simulation still works
self.assertIsInstance(s2.run(10), myokit.DataLog)
del (model2, m2, s2)
# Create protocol
# Protocol times: prep, step, post, full
tprep = 2800
tstep = 15
tpost = 0
# Step voltages
vhold = -80
vlo = -140
vhi = 100
res = 50
v = np.arange(vlo, vhi + res, res)
p = myokit.pacing.steptrain(v, vhold, tprep, tstep, tpost)
t = p.characteristic_time()
# Create simulation with protocol (set_protocol is not supported)
s = hh.AnalyticalSimulation(m, p)
# Membrane potential and protocol can't be used simultaneously
self.assertRaisesRegex(Exception, 'cannot be set if',
s.set_membrane_potential, -80)
# Pre should change the state and default state
state = s.state()
dstate = s.default_state()
s.pre(tprep + tstep)
self.assertNotEqual(state, s.state())
self.assertNotEqual(dstate, s.default_state())
self.assertRaises(ValueError, s.pre, -1)
# Run should change the state, not the default state
state = s.state()
dstate = s.default_state()
d = s.run(t)
self.assertNotEqual(state, s.state())
self.assertEqual(dstate, s.default_state())
self.assertRaisesRegex(ValueError, 'Duration', s.run, -1)
self.assertRaisesRegex(ValueError,
'Log interval',
s.run,
1,
log_interval=-1)
d['hello'] = [1, 2, 3]
self.assertRaisesRegex(ValueError, 'extra keys', s.run, 1, log=d)
del (d['hello'])
del (d[next(iter(d.keys()))])
self.assertRaisesRegex(ValueError, 'missing', s.run, 1, log=d)
# Reset should reset the state
s.reset()
self.assertEqual(state, s.state())
# Run can append to log
d = s.run(10)
n = len(d['engine.time'])
e = s.run(1, log=d)
self.assertIs(d, e)
self.assertTrue(len(d['engine.time']) > n)
# Run for zero duration
d = s.run(0)
self.assertEqual(len(d.time()), 0)
d = s.run(0)
self.assertEqual(len(d.time()), 0)
