Python BoxDomain.sample_grid Examples

Example #1

File: test_domains.py Project: jeffrey-hokanson/PSDR

def test_sample_grid(m=3):
    lb = 0 * np.ones(m)
    ub = 1 * np.ones(m)

    dom = BoxDomain(lb, ub)

    X = dom.sample_grid(5)
    assert len(X) == 5**m

Example #2

def test_isinside(m=5):
    np.random.seed(0)
    dom = BoxDomain(-10 * np.ones(m), -5 * np.ones(m))

    X = dom.sample(10)

    Xg = dom.sample_grid(2)
    hull = ConvexHullDomain(Xg)

    assert np.all(hull.isinside(X))

Example #3

def test_constraints(m=3):
    np.random.seed(0)

    dom = BoxDomain(-1 * np.ones(m), np.ones(m))

    # Lower pyramid portion
    dom_con = dom.add_constraints(A=np.ones((1, m)), b=np.ones(1))

    # Convex hull describes the same space as dom_con
    X = dom.sample_grid(2)
    hull = ConvexHullDomain(X, A=dom_con.A, b=dom_con.b)

    # Check that the same points are inside
    X = dom.sample(100)
    assert np.all(hull.isinside(X) == dom_con.isinside(X))

    # Check sampling
    X = hull.sample(100)
    assert np.all(dom_con.isinside(X))