def true_density(z):
z1, z2 = z[0], z[1]
w1 = lambda x: C.sin(2 * np.pi * x/4)
u = 0.5 * C.square((z2 - w1(z1))/0.4)
dummy = C.ones_like(u) * 1e7
# u = C.element_select(C.less_equal(z1,4), u, dummy)
cond = C.less_equal(z1,4)
u = C.element_select(cond, u, dummy) # u = cond*u + (1-cond)*dummy
return C.exp(-u)
def test_Sin(tmpdir, dtype):
data = np.asarray([0.0, -0.5, 0.5, 10, 20], dtype)
model = C.sin(data)
verify_no_input(model, tmpdir, 'Sin_0')
def test_Sin(tmpdir, dtype):
data = np.asarray([0.0, -0.5, 0.5, 10, 20], dtype)
model = C.sin(data)
verify_no_input(model, tmpdir, 'Sin_0')
def inner(a):
p = position(a)
integers = p / s # every s sequence item will be an integer
valid = C.less_equal(C.abs(C.sin(integers * pi)), tol) # sin of integer multiple of pi will return close to zero
result = C.sequence.gather(a, valid)
return result