def main(_args):
data = generate_data()
init_rng_key = PRNGKey(1273)
# nuts = NUTS(gmm)
# mcmc = MCMC(nuts, 100, 1000)
# mcmc.print_summary()
seeded_gmm = seed(gmm, init_rng_key)
model_trace = trace(seeded_gmm).get_trace(data)
max_plate_nesting = _guess_max_plate_nesting(model_trace)
enum_gmm = enum(config_enumerate(gmm), - max_plate_nesting - 1)
svi = SVI(enum_gmm, gmm_guide, Adam(0.1), RenyiELBO(-10.))
svi_state = svi.init(init_rng_key, data)
upd_fun = jax.jit(svi.update)
with tqdm.trange(100_000) as pbar:
for i in pbar:
svi_state, loss = upd_fun(svi_state, data)
pbar.set_description(f"SVI {loss}", True)
def test_svi_discrete_latent():
cont_inf_only_cls = [RenyiELBO(), Trace_ELBO(), TraceMeanField_ELBO()]
mixed_inf_cls = [TraceGraph_ELBO()]
assert not any([c.can_infer_discrete for c in cont_inf_only_cls])
assert all([c.can_infer_discrete for c in mixed_inf_cls])
def model():
numpyro.sample("x", dist.Bernoulli(0.5))
def guide():
probs = numpyro.param("probs", 0.2)
numpyro.sample("x", dist.Bernoulli(probs))
for elbo in cont_inf_only_cls:
svi = SVI(model, guide, optim.Adam(1), elbo)
s_name = type(elbo).__name__
w_msg = f"Currently, SVI with {s_name} loss does not support models with discrete latent variables"
with pytest.warns(UserWarning, match=w_msg):
svi.run(random.PRNGKey(0), 10)
@pytest.mark.parametrize("optim_class, args, kwargs", optimizers)
def test_optim_multi_params(optim_class, args, kwargs):
params = {
"x": jnp.array([1.0, 1.0, 1.0]),
"y": jnp.array([-1, -1.0, -1.0])
}
opt = optax_to_numpyro(optim_class(*args, **kwargs))
opt_state = opt.init(params)
for i in range(2000):
opt_state = step(opt_state, opt)
for _, param in opt.get_params(opt_state).items():
assert jnp.allclose(param, jnp.zeros(3))
@pytest.mark.parametrize("elbo", [Trace_ELBO(), RenyiELBO(num_particles=10)])
def test_beta_bernoulli(elbo):
data = jnp.array([1.0] * 8 + [0.0] * 2)
def model(data):
f = numpyro.sample("beta", dist.Beta(1.0, 1.0))
numpyro.sample("obs", dist.Bernoulli(f), obs=data)
def guide(data):
alpha_q = numpyro.param("alpha_q",
1.0,
constraint=constraints.positive)
beta_q = numpyro.param("beta_q", 1.0, constraint=constraints.positive)
numpyro.sample("beta", dist.Beta(alpha_q, beta_q))
adam = optax.adam(0.05)
def renyi_loss_fn(x):
return RenyiELBO(alpha=alpha,
num_particles=10).loss(random.PRNGKey(0), {}, model,
guide, x)
return ELBO().loss(random.PRNGKey(0), {}, model, guide, x)
def renyi_loss_fn(x):
return RenyiELBO(alpha=alpha,
num_particles=10).loss(random.PRNGKey(0), {}, model,
guide, x)
elbo_loss, elbo_grad = value_and_grad(elbo_loss_fn)(2.)
renyi_loss, renyi_grad = value_and_grad(renyi_loss_fn)(2.)
assert_allclose(elbo_loss, renyi_loss, rtol=1e-6)
assert_allclose(elbo_grad, renyi_grad, rtol=1e-6)
@pytest.mark.parametrize('elbo', [
ELBO(),
RenyiELBO(num_particles=10),
])
def test_beta_bernoulli(elbo):
data = jnp.array([1.0] * 8 + [0.0] * 2)
def model(data):
f = numpyro.sample("beta", dist.Beta(1., 1.))
numpyro.sample("obs", dist.Bernoulli(f), obs=data)
def guide(data):
alpha_q = numpyro.param("alpha_q",
1.0,
constraint=constraints.positive)
beta_q = numpyro.param("beta_q", 1.0, constraint=constraints.positive)
numpyro.sample("beta", dist.Beta(alpha_q, beta_q))
def elbo_loss_fn(x):
return ELBO().loss(random.PRNGKey(0), {}, model, guide, x)
def renyi_loss_fn(x):
return RenyiELBO(alpha=alpha, num_particles=10).loss(random.PRNGKey(0), {}, model, guide, x)
elbo_loss, elbo_grad = value_and_grad(elbo_loss_fn)(2.)
renyi_loss, renyi_grad = value_and_grad(renyi_loss_fn)(2.)
assert_allclose(elbo_loss, renyi_loss, rtol=1e-6)
assert_allclose(elbo_grad, renyi_grad, rtol=1e-6)
@pytest.mark.parametrize('elbo', [
ELBO(),
pytest.param(RenyiELBO(num_particles=10),
marks=pytest.mark.xfail(reason="https://github.com/pyro-ppl/numpyro/issues/414"))
])
def test_beta_bernoulli(elbo):
data = np.array([1.0] * 8 + [0.0] * 2)
def model(data):
f = numpyro.sample("beta", dist.Beta(1., 1.))
numpyro.sample("obs", dist.Bernoulli(f), obs=data)
def guide(data):
alpha_q = numpyro.param("alpha_q", 1.0,
constraint=constraints.positive)
beta_q = numpyro.param("beta_q", 1.0,
constraint=constraints.positive)
numpyro.sample("beta", dist.Beta(alpha_q, beta_q))
