def test_types_scalar_fix():
a = Scalar(1.0)
assert_(not a.isfixed)
a.fix()
assert_(a.isfixed)
def test_variables_setattr():
a = Variables(a0=Scalar(1.0))
a["a1"] = Scalar(2.0)
a["a1"].value += 1.0
assert_equal(a.get("a0").value, 1.0)
assert_equal(a.get("a1").value, 3.0)
def test_variables_merge():
a = Variables(a0=Scalar(1.0))
b = Variables(b0=Scalar(1.0))
c = merge_variables(dict(a=a, b=b))
a.get("a0").value += 1.0
assert_equal(a.get("a0").value, 2.0)
assert_equal(a.get("a0").value, c.get("a.a0").value)
def test_variables_set():
a = Scalar(1.0)
b = a
a.value = 2.0
assert_(a is b)
assert_(a.raw is b.raw)
v = Variables(dict(a=Scalar(1.0), b=Scalar(1.5)))
v.set({"a": 0.5})
assert_allclose(v.get("a"), 0.5)
def test_types_scalar_comparison():
a = Scalar(1.0)
b = Scalar(2.0)
assert_(a < b)
assert_(a <= b)
assert_(a != b)
b.value = 1.0
assert_(a == b)
def test_types_scalar_listen():
a = Scalar(1.0)
class Listener(object):
def __init__(self):
self.value = None
def __call__(self):
self.value = 3.0
l = Listener()
a.listen(l)
a.value = 3.0
assert_(l.value == 3.0)
class Foo1(Function):
def __init__(self):
self._a = Vector([0, 0])
self._b = Vector([0, 0])
self._c = Scalar(1)
super(Foo1, self).__init__("Foo1", a=self._a, b=self._b, c=self._c)
@property
def a(self):
return self._a.value
@property
def b(self):
return self._b.value
@property
def c(self):
return self._c.value
def fix_c(self):
self._c.fix()
def unfix_c(self):
self._c.unfix()
@c.setter
def c(self, v):
self._c.value = v
def value(self):
a = self.a
b = self.b
c = self.c
return (a @ b - 3 + a @ [1, 1] - b @ [1, 2] + 1 / c)**2
def gradient(self):
a = self.a
b = self.b
c = self.c
v = a @ b - 3 + a @ [1, 1] - b @ [1, 2] + 1 / c
da = 2 * v * array([b[0] + 1, b[1] + 1])
db = 2 * v * array([a[0] - 1, a[1] - 2])
dc = 2 * v * -1 / (c**2)
return {"a": da, "b": db, "c": dc}
def check_grad(self):
return self._check_grad()
def __init__(self, y, Q0, Q1, S0, covariates=None):
super(FastLMM, self).__init__(logistic=Scalar(0.0))
if not is_all_finite(y):
raise ValueError("There are non-finite values in the phenotype.")
self._flmmc = FastLMMCore(y, covariates, Q0, Q1, S0)
self.set_nodata()
def test_types_scalar_listen_indirect():
a = Scalar(1.0)
class Listener(object):
def __init__(self):
self.value = None
def __call__(self):
self.value = 3.0
l = Listener()
a.listen(l)
value = a.value
value.itemset(3.0)
assert_(l.value == 3.0)
def __init__(self, y, lik, X, QS=None):
y = ascontiguousarray(y, float)
X = asarray(X, float)
Function.__init__(
self,
"GLMM",
beta=Vector(zeros(X.shape[1])),
logscale=Scalar(0.0),
logitdelta=Scalar(0.0),
)
if not isinstance(lik, (tuple, list)):
lik = (lik, )
self._lik = (lik[0].lower(), ) + tuple(
ascontiguousarray(i) for i in lik[1:])
self._y = check_outcome(y, self._lik)
self._X = check_covariates(X)
if QS is None:
self._QS = economic_qs_zeros(self._y.shape[0])
else:
self._QS = check_economic_qs(QS)
if self._y.shape[0] != self._QS[0][0].shape[0]:
raise ValueError(
"Number of samples in outcome and covariance differ.")
if self._y.shape[0] != self._X.shape[0]:
raise ValueError(
"Number of samples in outcome and covariates differ.")
self._factr = 1e5
self._pgtol = 1e-6
self._verbose = False
self.set_variable_bounds("logscale", (log(0.001), 6.0))
self.set_variable_bounds("logitdelta", (-50, +15))
if lik[0] == "probit":
self.delta = 0.0
self.fix("delta")
def __init__(self, X):
"""
Constructor.
Parameters
----------
X : array_like
Matrix X from K = s⋅XXᵀ.
"""
self._logscale = Scalar(0.0)
self._X = X
Function.__init__(self, "LinearCov", logscale=self._logscale)
self._logscale.bounds = (-20.0, +10)
def __init__(self, dim):
"""
Constructor.
Parameters
----------
dim : int
Matrix dimension, d.
"""
self._dim = dim
self._I = eye(dim)
self._logscale = Scalar(0.0)
Function.__init__(self, "EyeCov", logscale=self._logscale)
self._logscale.bounds = (-20.0, +10)
def __init__(self, K0):
"""
Constructor.
Parameters
----------
K0 : array_like
A semi-definite positive matrix.
"""
from numpy_sugar.linalg import check_symmetry
self._logscale = Scalar(0.0)
Function.__init__(self, "GivenCov", logscale=self._logscale)
self._logscale.bounds = (-20.0, +10)
if not check_symmetry(K0):
raise ValueError(
"The provided covariance-matrix is not symmetric.")
self._K0 = K0
def test_types_scalar_copy():
a = Scalar(1.0)
b = a.copy()
assert_(a is not b)
assert_(a == b)
def __init__(self, y, X, QS=None, restricted=False):
"""
Constructor.
Parameters
----------
y : array_like
Outcome.
X : array_like
Covariates as a two-dimensional array.
QS : tuple
Economic eigendecompositon in form of ``((Q0, ), S0)`` of a
covariance matrix ``K``.
restricted : bool
``True`` for restricted maximum likelihood optimization; ``False``
otherwise. Defaults to ``False``.
"""
from numpy_sugar import is_all_finite
logistic = Scalar(0.0)
logistic.listen(self._delta_update)
logistic.bounds = (-numbers.logmax, +numbers.logmax)
Function.__init__(self, "LMM", logistic=logistic)
self._logistic = logistic
y = asarray(y, float).ravel()
if not is_all_finite(y):
raise ValueError("There are non-finite values in the outcome.")
if len(y) == 0:
raise ValueError("The outcome array is empty.")
X = atleast_2d(asarray(X, float).T).T
if not is_all_finite(X):
raise ValueError("There are non-finite values in the covariates matrix.")
self._optimal = {"beta": False, "scale": False}
if QS is None:
QS = economic_qs_zeros(len(y))
self._B = B(QS[0][0], QS[1], 0.0, 1.0)
self.delta = 1.0
logistic.fix()
else:
self._B = B(QS[0][0], QS[1], 0.5, 0.5)
self.delta = 0.5
if QS[0][0].shape[0] != len(y):
msg = "Sample size differs between outcome and covariance decomposition."
raise ValueError(msg)
if y.shape[0] != X.shape[0]:
msg = "Sample size differs between outcome and covariates."
raise ValueError(msg)
self._y = y
self._Q0 = QS[0][0]
self._S0 = QS[1]
self._Xsvd = SVD(X)
self._tbeta = zeros(self._Xsvd.rank)
self._scale = 1.0
self._fix = {"beta": False, "scale": False}
self._restricted = restricted
def __init__(self):
Function.__init__(self, offset=Scalar(1.0))
def __init__(self):
self._c = Scalar(1)
super(Foo4, self).__init__("Foo4", c=self._c)
def __init__(self):
self._a = Vector([0, 0])
self._b = Vector([0, 0])
self._c = Scalar(1)
super(Foo1, self).__init__("Foo1", a=self._a, b=self._b, c=self._c)
def __init__(self):
self._c = Scalar(1)
self._c.bounds = [1e-9, 1e9]
super(Foo2, self).__init__("Foo2", c=self._c)
def copy(self):
o = FastLMM.__new__(FastLMM)
super(FastLMM, o).__init__(logistic=Scalar(self.get('logistic')))
o._flmmc = self._flmmc.copy()
o.set_nodata()
return o
def test_types_modify_scalar():
a = Scalar(1.0)
value = atleast_1d(a.value)
value[0] = 2.0
assert_(a.value == value[0])
def __init__(self):
Function.__init__(self, logscale=Scalar(0.0))
def test_variables_str():
v = Variables(dict(a=Scalar(1.0), b=Scalar(1.5)))
msg = "Variables(a=Scalar(1.0),\n"
msg += " " * 10 + "b=Scalar(1.5))"
assert_equal(v.__str__(), msg)
