def test_sdp(self):
"""Test a problem with semidefinite cones.
"""
a = sp.rand(100, 100, .1, random_state=1)
a = a.todense()
X = Variable(100, 100)
obj = at.norm(X, "nuc") + at.norm(X - a, 'fro')
p = Problem(Minimize(obj))
p.solve(solver="SCS")
def test_sdp(self):
"""Test a problem with semidefinite cones.
"""
a = sp.rand(100,100,.1, random_state=1)
a = a.todense()
X = Variable(100,100)
obj = at.norm(X, "nuc") + at.norm(X-a,'fro')
p = Problem(Minimize(obj))
p.solve(solver="SCS")
def test_sdp(self) -> None:
"""Test a problem with semidefinite cones.
"""
self.skipTest("Too slow.")
a = sp.rand(100, 100, .1, random_state=1)
a = a.todense()
X = Variable((100, 100))
obj = at.norm(X, "nuc") + at.norm(X - a, 'fro')
p = Problem(cp.Minimize(obj))
p.solve(solver="SCS")
def test_sum_squares(self):
X = Variable(5, 4)
P = np.asmatrix(np.random.randn(3, 5))
Q = np.asmatrix(np.random.randn(4, 7))
M = np.asmatrix(np.random.randn(3, 7))
y = P*X*Q + M
self.assertFalse(y.is_constant())
self.assertTrue(y.is_affine())
self.assertTrue(y.is_quadratic())
self.assertTrue(y.is_dcp())
s = sum_squares(y)
self.assertFalse(s.is_constant())
self.assertFalse(s.is_affine())
self.assertTrue(s.is_quadratic())
self.assertTrue(s.is_dcp())
# Frobenius norm squared is indeed quadratic
# but can't show quadraticity using recursive rules
t = norm(y, 'fro')**2
self.assertFalse(t.is_constant())
self.assertFalse(t.is_affine())
self.assertFalse(t.is_quadratic())
self.assertTrue(t.is_dcp())
def test_sum_squares(self):
X = Variable(5, 4)
P = np.asmatrix(np.random.randn(3, 5))
Q = np.asmatrix(np.random.randn(4, 7))
M = np.asmatrix(np.random.randn(3, 7))
y = P*X*Q + M
self.assertFalse(y.is_constant())
self.assertTrue(y.is_affine())
self.assertTrue(y.is_quadratic())
self.assertTrue(y.is_dcp())
s = sum_squares(y)
self.assertFalse(s.is_constant())
self.assertFalse(s.is_affine())
self.assertTrue(s.is_quadratic())
self.assertTrue(s.is_dcp())
# Frobenius norm squared is indeed quadratic
# but can't show quadraticity using recursive rules
t = norm(y, 'fro')**2
self.assertFalse(t.is_constant())
self.assertFalse(t.is_affine())
self.assertFalse(t.is_quadratic())
self.assertTrue(t.is_dcp())
def test_gurobi_environment(self) -> None:
"""Tests that Gurobi environments can be passed to Model.
Gurobi environments can include licensing and model parameter data.
"""
from cvxpy import GUROBI
if GUROBI in INSTALLED_SOLVERS:
import gurobipy
# Set a few parameters to random values close to their defaults
params = {
'MIPGap': np.random.random(), # range {0, INFINITY}
'AggFill': np.random.randint(10), # range {-1, MAXINT}
'PerturbValue': np.random.random(), # range: {0, INFINITY}
}
# Create a custom environment and set some parameters
custom_env = gurobipy.Env()
for k, v in params.items():
custom_env.setParam(k, v)
# Testing QP Solver Interface
sth = StandardTestLPs.test_lp_0(solver='GUROBI', env=custom_env)
model = sth.prob.solver_stats.extra_stats
for k, v in params.items():
# https://www.gurobi.com/documentation/9.1/refman/py_model_getparaminfo.html
name, p_type, p_val, p_min, p_max, p_def = model.getParamInfo(
k)
self.assertEqual(v, p_val)
else:
with self.assertRaises(Exception) as cm:
prob = Problem(Minimize(norm(self.x, 1)), [self.x == 0])
prob.solve(solver=GUROBI, TimeLimit=0)
self.assertEqual(str(cm.exception),
"The solver %s is not installed." % GUROBI)
def mat_norm_2(self, solver):
A = np.random.randn(5, 3)
B = np.random.randn(5, 2)
p = Problem(Minimize(norm(A @ self.C - B, 2)))
s = self.solve_QP(p, solver)
for var in p.variables():
self.assertItemsAlmostEqual(lstsq(A, B)[0],
s.primal_vars[var.id], places=1)
def norm_2(self, solver):
A = np.random.randn(10, 5)
b = np.random.randn(10)
p = Problem(Minimize(norm(A @ self.w - b, 2)))
self.solve_QP(p, solver)
for var in p.variables():
self.assertItemsAlmostEqual(lstsq(A, b)[0].flatten(), var.value,
places=1)
def norm_2(self, solver):
A = numpy.random.randn(10, 5)
b = numpy.random.randn(10, 1)
p = Problem(Minimize(norm(A * self.w - b, 2)))
s = self.solve_QP(p, solver)
for var in p.variables():
self.assertItemsAlmostEqual(lstsq(A, b)[0].flatten(),
s.primal_vars[var.id],
places=1)
def test_gurobi_time_limit_no_solution(self) -> None:
"""Make sure that if Gurobi terminates due to a time limit before finding a solution:
1) no error is raised,
2) solver stats are returned.
The test is skipped if something changes on Gurobi's side so that:
- a solution is found despite a time limit of zero,
- a different termination criteria is hit first.
"""
from cvxpy import GUROBI
if GUROBI in INSTALLED_SOLVERS:
import gurobipy
objective = Minimize(self.x[0])
constraints = [self.x[0] >= 1]
prob = Problem(objective, constraints)
try:
prob.solve(solver=GUROBI, TimeLimit=0.0)
except Exception as e:
self.fail(
"An exception %s is raised instead of returning a result."
% e)
extra_stats = None
solver_stats = getattr(prob, "solver_stats", None)
if solver_stats:
extra_stats = getattr(solver_stats, "extra_stats", None)
self.assertTrue(extra_stats,
"Solver stats have not been returned.")
nb_solutions = getattr(extra_stats, "SolCount", None)
if nb_solutions:
self.skipTest(
"Gurobi has found a solution, the test is not relevant anymore."
)
solver_status = getattr(extra_stats, "Status", None)
if solver_status != gurobipy.StatusConstClass.TIME_LIMIT:
self.skipTest(
"Gurobi terminated for a different reason than reaching time limit, "
"the test is not relevant anymore.")
else:
with self.assertRaises(Exception) as cm:
prob = Problem(Minimize(norm(self.x, 1)), [self.x == 0])
prob.solve(solver=GUROBI, TimeLimit=0)
self.assertEqual(str(cm.exception),
"The solver %s is not installed." % GUROBI)
def optimize(self):
self._pre_optimizer.optimize()
self._pre_optimizer.update()
points = self.graph.free_points
landmarks = self.graph.landmarks
num_points = len(points)
point_dim = self.graph.point_dim
num_landmarks = len(landmarks)
landmark_dim = self.graph.landmark_dim
transforms = [
equivalence.SumMass(self.graph.correspondence_map.set_map()),
equivalence.ExpDistance(self._sigma),
equivalence.Facing()
]
E, W = equivalence.equivalence_matrix(landmarks, transforms=transforms)
if E.shape[0] == 0:
self.M = self._pre_optimizer.M
self.P = self._pre_optimizer.P
self.res_d = self._pre_optimizer.res_d
self.res_t = self._pre_optimizer.res_t
self.equivalence_pairs = []
return
Am, Ap, d, sigma_d = self.graph.observation_system()
Bp, t, sigma_t = self.graph.odometry_system()
S_d, S_t = sp.sparse.diags(
1 / _sanitized_noise_array(sigma_d)), sp.sparse.diags(
1 / _sanitized_noise_array(sigma_t))
M = cp.Variable((landmark_dim, num_landmarks))
P = cp.Variable((point_dim, num_points))
M.value = self._pre_optimizer.M
P.value = self._pre_optimizer.P
objective = cp.Minimize(mixed_norm(W * E * M.T))
constraints = [
norm((Am * vec(M)) +
(Ap * vec(P)) - d) <= 2 * np.linalg.norm(sigma_d + 1e-6),
norm((Bp * vec(P)) - t) <= 2 * np.linalg.norm(sigma_t + 1e-6)
]
problem = cp.Problem(objective, constraints)
problem.solve(verbose=self._verbosity,
solver=self._solver,
warm_start=True)
if problem.solution.status == 'infeasible':
self.M = self._pre_optimizer.M
self.P = self._pre_optimizer.P
self.res_d = self._pre_optimizer.res_d
self.res_t = self._pre_optimizer.res_t
self.equivalence_pairs = []
return
E_ = E[np.abs(np.linalg.norm(E * M.value.T, axis=1)) < 0.001, :]
objective = cp.Minimize(
sum_squares(S_d * ((Am * vec(M)) + (Ap * vec(P)) - d)) +
sum_squares(S_t * ((Bp * vec(P)) - t)))
constraints = [E_ * M.T == 0] if E_.shape[0] > 0 else []
problem = cp.Problem(objective, constraints)
problem.solve(verbose=self._verbosity,
solver=self._solver,
warm_start=True)
self.M = M.value
self.P = P.value
m = self.M.ravel(order='F')
p = self.P.ravel(order='F')
self.res_d = Am.dot(m) + Ap.dot(p) - d
self.res_t = Bp.dot(p) - t
self.equivalence_pairs = [(landmarks[i], landmarks[j])
for (i, j) in E_.tolil().rows]