def test_draw_samples(self):
np.random.seed(0)
samples_1_np = np.random.randn(5)
samples_1 = mx.nd.array(samples_1_np)
samples_2_np = np.random.randn(50)
samples_2 = mx.nd.array(samples_2_np)
m = Model()
v = Variable(shape=(1,))
m.v2 = Normal.define_variable(mean=v, variance=mx.nd.array([1]), rand_gen=MockMXNetRandomGenerator(samples_1))
m.v3 = Normal.define_variable(mean=m.v2, variance=mx.nd.array([0.1]), shape=(10,), rand_gen=MockMXNetRandomGenerator(samples_2))
np.random.seed(0)
v_np =np.random.rand(1)
v_mx = mx.nd.array(v_np)
v_rt = add_sample_dimension(mx.nd, v_mx)
variance = m.v2.factor.variance
variance2 = m.v3.factor.variance
variance_rt = add_sample_dimension(mx.nd, variance.constant)
variance2_rt = add_sample_dimension(mx.nd, variance2.constant)
samples = m.draw_samples(F=mx.nd, num_samples=5, targets=[m.v3.uuid],
variables={v.uuid: v_rt, variance.uuid: variance_rt, variance2.uuid: variance2_rt})[0]
samples_np = v_np + samples_1_np[:, None] + np.sqrt(0.1)*samples_2_np.reshape(5,10)
assert array_has_samples(mx.nd, samples) and get_num_samples(mx.nd, samples)==5
assert np.allclose(samples.asnumpy(), samples_np)
def test_compute_log_prob(self):
m = Model()
v = Variable(shape=(1,))
m.v2 = Normal.define_variable(mean=v, variance=mx.nd.array([1]))
m.v3 = Normal.define_variable(mean=m.v2, variance=mx.nd.array([1]), shape=(10,))
np.random.seed(0)
v_mx = mx.nd.array(np.random.randn(1))
v2_mx = mx.nd.array(np.random.randn(1))
v3_mx = mx.nd.array(np.random.randn(10))
v_rt = add_sample_dimension(mx.nd, v_mx)
v2_rt = add_sample_dimension(mx.nd, v2_mx)
v3_rt = add_sample_dimension(mx.nd, v3_mx)
variance = m.v2.factor.variance
variance2 = m.v3.factor.variance
variance_rt = add_sample_dimension(mx.nd, variance.constant)
variance2_rt = add_sample_dimension(mx.nd, variance2.constant)
log_pdf = m.log_pdf(F=mx.nd, variables={m.v2.uuid: v2_rt, m.v3.uuid:v3_rt, variance.uuid: variance_rt, variance2.uuid: variance2_rt, v.uuid: v_rt}).asscalar()
variables = {m.v2.factor.mean.uuid: v_rt, m.v2.factor.variance.uuid: variance_rt, m.v2.factor.random_variable.uuid: v2_rt}
log_pdf_1 = mx.nd.sum(m.v2.factor.log_pdf(F=mx.nd, variables=variables))
variables = {m.v3.factor.mean.uuid: v2_rt, m.v3.factor.variance.uuid: variance2_rt, m.v3.factor.random_variable.uuid: v3_rt}
log_pdf_2 = mx.nd.sum(m.v3.factor.log_pdf(F=mx.nd, variables=variables))
assert log_pdf == (log_pdf_1 + log_pdf_2).asscalar()
def _make_gluon_function_evaluation_rand_param(self, dtype, broadcastable):
class Dot(HybridBlock):
def __init__(self, params=None, prefix=None):
super(Dot, self).__init__(params=params, prefix=prefix)
with self.name_scope():
self.const = self.params.get('const',
shape=(1, ),
dtype=dtype,
init=Zero())
def hybrid_forward(self, F, a, b, const):
return F.broadcast_add(F.linalg.gemm2(a, b), const)
dot = Dot(prefix='dot_')
dot.initialize()
dot.hybridize()
print(dot.collect_params())
func_wrapper = MXFusionGluonFunction(dot,
1,
dtype=dtype,
broadcastable=broadcastable)
from mxfusion.components.distributions.normal import Normal
rand_var = Normal.define_variable(shape=(1, ))
out = func_wrapper(Variable(shape=(3, 4)),
Variable(shape=(4, 5)),
dot_const=rand_var)
return out.factor
def test_add_unresolved_components_distribution(self):
v = mfc.Variable()
m = mfc.Variable()
f = Normal.define_variable(mean=m, variance=v)
component_set = set((v, m, f))
self.fg.f = f
self.assertTrue(component_set <= set(self.fg.components_graph.nodes().keys()),
"Variables are all added to _components_graph {} {}".format(component_set, self.fg.components_graph.nodes().keys()))
self.assertTrue(set((v.uuid, m.uuid, f.uuid)) <= self.fg.components.keys(), "Variable is added to _components dict. {} {}".format(v.uuid, self.fg.components))
def make_simple_model(self):
m = Model()
mean = Variable()
variance = Variable()
m.r = Normal.define_variable(mean=mean, variance=variance)
return m