Python GP.stretch示例

示例#1

def test_stretching():
    # Test construction:
    p = GP(lambda x: x**2, Linear())
    assert str(p.stretch(1)) == "GP(<lambda> > 1, Linear() > 1)"

    # Test case:
    p_stretched = p.stretch(5)

    x = B.linspace(0, 5, 10)
    y = p_stretched(x).sample()

    post = p.measure | (p_stretched(x, B.epsilon), y)
    assert_equal_normals(post(p(x / 5)), post(p_stretched(x)))
    assert_equal_normals(post(p(x)), post(p_stretched(x * 5)))

示例#2

文件： test_model.py 项目： Black-Swan-ICL/stheno

def test_stretching():
    # Test construction:
    p = GP(TensorProductMean(lambda x: x**2), EQ())
    assert str(p.stretch(1)) == "GP(<lambda> > 1, EQ() > 1)"

    # Test case:
    p = GP(EQ())
    p_stretched = p.stretch(5)

    x = B.linspace(0, 5, 10)
    y = p_stretched(x).sample()

    post = p.measure | (p_stretched(x), y)
    assert_equal_normals(post(p(x / 5)), post(p_stretched(x)))
    assert_equal_normals(post(p(x)), post(p_stretched(x * 5)))