def test_unknown_options_or_solver(self):
c = np.array([-3, -2])
A_ub = [[2, 1], [1, 1], [1, 0]]
b_ub = [10, 8, 4]
def f(c,
A_ub=None,
b_ub=None,
A_eq=None,
b_eq=None,
bounds=None,
options={}):
linprog(c,
A_ub,
b_ub,
A_eq,
b_eq,
bounds,
method=self.method,
options=options)
_assert_warns(OptimizeWarning,
f,
c,
A_ub=A_ub,
b_ub=b_ub,
options=dict(spam='42'))
assert_raises(ValueError,
linprog,
c,
A_ub=A_ub,
b_ub=b_ub,
method='ekki-ekki-ekki')
def test_warns_on_failure(self):
# Set nsteps small to ensure failure
solver = self._get_solver(f, jac)
solver.set_integrator(self.solver_name, nsteps=1)
ic = [1.0, 0.0]
solver.set_initial_value(ic, 0.0)
_assert_warns(UserWarning, solver.integrate, pi)
def test_warns_on_failure(self):
# Set nsteps small to ensure failure
solver = self._get_solver(f, jac)
solver.set_integrator(self.solver_name, nsteps=1)
ic = [1.0, 0.0]
solver.set_initial_value(ic, 0.0)
_assert_warns(UserWarning, solver.integrate, pi)
def test_warn_mixed_constraints(self):
# warns about inefficiency of mixed equality/inequality constraints
fun = lambda x: (x[0] - 1)**2 + (x[1] - 2.5)**2 + (x[2] - 0.75)**2
cons = NonlinearConstraint(lambda x: [x[0]**2 - x[1], x[1] - x[2]],
[1.1, .8], [1.1, 1.4])
bnds = ((0, None), (0, None), (0, None))
with suppress_warnings() as sup:
sup.filter(UserWarning, "delta_grad == 0.0")
_assert_warns(OptimizeWarning, minimize, fun, (2, 0, 1),
method=self.method, bounds=bnds, constraints=cons)
def test_unknown_options_or_solver():
c = np.array([-3,-2])
A_ub = [[2,1], [1,1], [1,0]]
b_ub = [10,8,4]
_assert_warns(OptimizeWarning, linprog,
c, A_ub=A_ub, b_ub=b_ub, options=dict(spam='42'))
assert_raises(ValueError, linprog,
c, A_ub=A_ub, b_ub=b_ub, method='ekki-ekki-ekki')
def test_unknown_options_or_solver():
c = np.array([-3,-2])
A_ub = [[2,1], [1,1], [1,0]]
b_ub = [10,8,4]
_assert_warns(OptimizeWarning, linprog,
c, A_ub=A_ub, b_ub=b_ub, options=dict(spam='42'))
assert_raises(ValueError, linprog,
c, A_ub=A_ub, b_ub=b_ub, method='ekki-ekki-ekki')
def test_warn_ignored_options(self):
# warns about constraint options being ignored
fun = lambda x: (x[0] - 1)**2 + (x[1] - 2.5)**2 + (x[2] - 0.75)**2
x0 = (2, 0, 1)
if self.method == "slsqp":
bnds = ((0, None), (0, None), (0, None))
else:
bnds = None
cons = NonlinearConstraint(lambda x: x[0], 2, np.inf)
res = minimize(fun,
x0,
method=self.method,
bounds=bnds,
constraints=cons)
# no warnings without constraint options
assert_allclose(res.fun, 1)
cons = LinearConstraint([1, 0, 0], 2, np.inf)
res = minimize(fun,
x0,
method=self.method,
bounds=bnds,
constraints=cons)
# no warnings without constraint options
assert_allclose(res.fun, 1)
cons = []
cons.append(
NonlinearConstraint(lambda x: x[0]**2,
2,
np.inf,
keep_feasible=True))
cons.append(
NonlinearConstraint(lambda x: x[0]**2, 2, np.inf, hess=BFGS()))
cons.append(
NonlinearConstraint(lambda x: x[0]**2,
2,
np.inf,
finite_diff_jac_sparsity=42))
cons.append(
NonlinearConstraint(lambda x: x[0]**2,
2,
np.inf,
finite_diff_rel_step=42))
cons.append(LinearConstraint([1, 0, 0], 2, np.inf, keep_feasible=True))
for con in cons:
_assert_warns(OptimizeWarning,
minimize,
fun,
x0,
method=self.method,
bounds=bnds,
constraints=cons)
def test_unknown_options(self):
c = np.array([-3, -2])
A_ub = [[2, 1], [1, 1], [1, 0]]
b_ub = [10, 8, 4]
def f(c, A_ub=None, b_ub=None, A_eq=None, b_eq=None, bounds=None,
options={}):
linprog(c, A_ub, b_ub, A_eq, b_eq, bounds, method=self.method,
options=options)
o = {key: self.options[key] for key in self.options}
o['spam'] = 42
_assert_warns(OptimizeWarning, f,
c, A_ub=A_ub, b_ub=b_ub, options=o)
def test_unknown_options(self):
c = np.array([-3, -2])
A_ub = [[2, 1], [1, 1], [1, 0]]
b_ub = [10, 8, 4]
def f(c, A_ub=None, b_ub=None, A_eq=None, b_eq=None, bounds=None,
options={}):
linprog(c, A_ub, b_ub, A_eq, b_eq, bounds, method=self.method,
options=options)
o = {key: self.options[key] for key in self.options}
o['spam'] = 42
_assert_warns(OptimizeWarning, f,
c, A_ub=A_ub, b_ub=b_ub, options=o)
def test_warn_mixed_constraints(self):
# warns about inefficiency of mixed equality/inequality constraints
fun = lambda x: (x[0] - 1)**2 + (x[1] - 2.5)**2 + (x[2] - 0.75)**2
cons = NonlinearConstraint(lambda x: [x[0]**2 - x[1], x[1] - x[2]],
[1.1, .8], [1.1, 1.4])
bnds = ((0, None), (0, None), (0, None))
with suppress_warnings() as sup:
sup.filter(UserWarning, "delta_grad == 0.0")
_assert_warns(OptimizeWarning,
minimize,
fun, (2, 0, 1),
method=self.method,
bounds=bnds,
constraints=cons)
def test_unknown_options_or_solver(self):
c = np.array([-3, -2])
A_ub = [[2, 1], [1, 1], [1, 0]]
b_ub = [10, 8, 4]
def f(c, A_ub=None, b_ub=None, A_eq=None, b_eq=None, bounds=None,
options={}):
linprog(c, A_ub, b_ub, A_eq, b_eq, bounds, method=self.method,
options=options)
_assert_warns(OptimizeWarning, f,
c, A_ub=A_ub, b_ub=b_ub, options=dict(spam='42'))
assert_raises(ValueError, linprog,
c, A_ub=A_ub, b_ub=b_ub, method='ekki-ekki-ekki')
def test_exactly_singular(self):
A = np.array([[0, 0], [1j, 1j]])
B = np.asarray([[1, 1], [0, 0]])
for M in A, A.T, B, B.T:
expected_warning = _matfuncs_inv_ssq.LogmExactlySingularWarning
L, info = _assert_warns(expected_warning, logm, M, disp=False)
E = expm(L)
assert_allclose(E, M, atol=1e-14)
def test_exactly_singular(self):
A = np.array([[0, 0], [1j, 1j]])
B = np.asarray([[1, 1], [0, 0]])
for M in A, A.T, B, B.T:
expected_warning = _matfuncs_inv_ssq.LogmExactlySingularWarning
L, info = _assert_warns(expected_warning, logm, M, disp=False)
E = expm(L)
assert_allclose(E, M, atol=1e-14)
def test_warn_ignored_options(self):
# warns about constraint options being ignored
fun = lambda x: (x[0] - 1)**2 + (x[1] - 2.5)**2 + (x[2] - 0.75)**2
x0 = (2, 0, 1)
if self.method == "slsqp":
bnds = ((0, None), (0, None), (0, None))
else:
bnds = None
cons = NonlinearConstraint(lambda x: x[0], 2, np.inf)
res = minimize(fun, x0, method=self.method,
bounds=bnds, constraints=cons)
# no warnings without constraint options
assert_allclose(res.fun, 1)
cons = LinearConstraint([1, 0, 0], 2, np.inf)
res = minimize(fun, x0, method=self.method,
bounds=bnds, constraints=cons)
# no warnings without constraint options
assert_allclose(res.fun, 1)
cons = []
cons.append(NonlinearConstraint(lambda x: x[0]**2, 2, np.inf,
keep_feasible=True))
cons.append(NonlinearConstraint(lambda x: x[0]**2, 2, np.inf,
hess=BFGS()))
cons.append(NonlinearConstraint(lambda x: x[0]**2, 2, np.inf,
finite_diff_jac_sparsity=42))
cons.append(NonlinearConstraint(lambda x: x[0]**2, 2, np.inf,
finite_diff_rel_step=42))
cons.append(LinearConstraint([1, 0, 0], 2, np.inf,
keep_feasible=True))
for con in cons:
_assert_warns(OptimizeWarning, minimize, fun, x0,
method=self.method, bounds=bnds, constraints=cons)
def test_indeterminate_covariance(self):
# Test that a warning is returned when pcov is indeterminate
xdata = np.array([1, 2, 3, 4, 5, 6])
ydata = np.array([1, 2, 3, 4, 5.5, 6])
_assert_warns(OptimizeWarning, curve_fit, lambda x, a, b: a * x, xdata,
ydata)
def test_nearly_singular(self):
M = np.array([[1e-100]])
expected_warning = _matfuncs_inv_ssq.LogmNearlySingularWarning
L, info = _assert_warns(expected_warning, logm, M, disp=False)
E = expm(L)
assert_allclose(E, M, atol=1e-14)
def test_indeterminate_covariance(self):
# Test that a warning is returned when pcov is indeterminate
xdata = np.array([1, 2, 3, 4, 5, 6])
ydata = np.array([1, 2, 3, 4, 5.5, 6])
_assert_warns(OptimizeWarning, curve_fit,
lambda x, a, b: a*x, xdata, ydata)
def test_nearly_singular(self):
M = np.array([[1e-100]])
expected_warning = _matfuncs_inv_ssq.LogmNearlySingularWarning
L, info = _assert_warns(expected_warning, logm, M, disp=False)
E = expm(L)
assert_allclose(E, M, atol=1e-14)