def test_dir_tight(self):
theta = DirichletParameterNode(
'theta',
Factor(['X', 'ZDummy'], {
'X': ['same', 'diff'],
'ZDummy': ['dummy']
}, {
('same', 'dummy'): 1,
('diff', 'dummy'): 1,
},
logarithmetic=False))
X = DiscreteVariableNode('X', ['same', 'diff'], logarithmetic=False)
D = DiscreteVariableNode('ZDummy', ['dummy'], logarithmetic=False)
f = DirichletFactorNode('f')
X.observed({('same', ): 0.8, ('diff', ): 0.2})
f.connect(theta)
f.connect(X, parent=False)
f.connect(D)
X.message_to(f)
D.message_to(f)
f.update()
f.message_to(theta)
theta.message_to(f)
X.observed({('same', ): 0.5, ('diff', ): 0.7})
X.message_to(f)
f.update()
f.message_to(theta)
def test_dir_tight(self):
theta = DirichletParameterNode('theta', Factor(
['X', 'ZDummy'],
{
'X': ['same', 'diff'],
'ZDummy': ['dummy']
},
{
('same', 'dummy'): 1,
('diff', 'dummy'): 1,
},
logarithmetic=False
))
X = DiscreteVariableNode('X', ['same', 'diff'], logarithmetic=False)
D = DiscreteVariableNode('ZDummy', ['dummy'], logarithmetic=False)
f = DirichletFactorNode('f')
X.observed({('same',): 0.8, ('diff',): 0.2})
f.connect(theta)
f.connect(X, parent=False)
f.connect(D)
X.message_to(f)
D.message_to(f)
f.update()
f.message_to(theta)
theta.message_to(f)
X.observed({('same',): 0.5, ('diff',): 0.7})
X.message_to(f)
f.update()
f.message_to(theta)
def test_parameter(self):
alpha = DirichletParameterNode('theta', Factor(
['X0', 'X1'],
{
'X0': ['x0_0', 'x0_1'],
'X1': ['x1_0', 'x1_1', 'x1_2'],
},
{
('x0_0', 'x1_0'): 1,
('x0_0', 'x1_1'): 8,
('x0_0', 'x1_2'): 1,
('x0_1', 'x1_0'): 1,
('x0_1', 'x1_1'): 2,
('x0_1', 'x1_2'): 1,
}
))
factor = DirichletFactorNode('factor')
x0 = DiscreteVariableNode('X0', ['x0_0', 'x0_1'])
x1 = DiscreteVariableNode('X1', ['x1_0', 'x1_1', 'x1_2'])
x0.observed({('x0_0',): 1})
x1.observed({('x1_0',): 0.7, ('x1_1',): 0.2, ('x1_2',): 0.1})
factor.connect(alpha)
factor.connect(x0, parent=False)
factor.connect(x1, parent=True)
x0.message_to(factor)
x1.message_to(factor)
factor.update()
factor.message_to(x0)
factor.message_to(x1)
x0.update()
factor.message_to(alpha)
print alpha.alpha
alpha.message_to(factor)
factor.update()
factor.message_to(alpha)
print alpha.alpha
