def test_formula():
for j in 0, 1:
np.random.seed(34234)
n = 200
y = np.random.randint(0, 2, size=n)
x1 = np.random.normal(size=n)
x2 = np.random.normal(size=n)
g = np.random.randint(0, 25, size=n)
x = np.hstack((x1[:, None], x2[:, None]))
if j == 0:
model1 = ConditionalLogit(y, x, groups=g)
else:
model1 = ConditionalPoisson(y, x, groups=g)
result1 = model1.fit()
df = pd.DataFrame({"y": y, "x1": x1, "x2": x2, "g": g})
if j == 0:
model2 = ConditionalLogit.from_formula(
"y ~ 0 + x1 + x2", groups="g", data=df)
else:
model2 = ConditionalPoisson.from_formula(
"y ~ 0 + x1 + x2", groups="g", data=df)
result2 = model2.fit()
assert_allclose(result1.params, result2.params, rtol=1e-5)
assert_allclose(result1.bse, result2.bse, rtol=1e-5)
assert_allclose(result1.cov_params(), result2.cov_params(), rtol=1e-5)
assert_allclose(result1.tvalues, result2.tvalues, rtol=1e-5)
def test_formula():
for j in 0, 1:
np.random.seed(34234)
n = 200
y = np.random.randint(0, 2, size=n)
x1 = np.random.normal(size=n)
x2 = np.random.normal(size=n)
g = np.random.randint(0, 25, size=n)
x = np.hstack((x1[:, None], x2[:, None]))
if j == 0:
model1 = ConditionalLogit(y, x, groups=g)
else:
model1 = ConditionalPoisson(y, x, groups=g)
result1 = model1.fit()
df = pd.DataFrame({"y": y, "x1": x1, "x2": x2, "g": g})
if j == 0:
model2 = ConditionalLogit.from_formula(
"y ~ 0 + x1 + x2", groups="g", data=df)
else:
model2 = ConditionalPoisson.from_formula(
"y ~ 0 + x1 + x2", groups="g", data=df)
result2 = model2.fit()
assert_allclose(result1.params, result2.params, rtol=1e-5)
assert_allclose(result1.bse, result2.bse, rtol=1e-5)
assert_allclose(result1.cov_params(), result2.cov_params(), rtol=1e-5)
assert_allclose(result1.tvalues, result2.tvalues, rtol=1e-5)
def test_lasso_poisson():
np.random.seed(342394)
n = 200
groups = np.arange(10)
groups = np.kron(groups, np.ones(n // 10))
group_effects = np.random.normal(size=10)
group_effects = np.kron(group_effects, np.ones(n // 10))
x = np.random.normal(size=(n, 4))
params = np.r_[0, 0, 1, 0]
lin_pred = np.dot(x, params) + group_effects
mean = np.exp(lin_pred)
y = np.random.poisson(mean)
model0 = ConditionalPoisson(y, x, groups=groups)
result0 = model0.fit()
# Should be the same as model0
model1 = ConditionalPoisson(y, x, groups=groups)
result1 = model1.fit_regularized(L1_wt=0, alpha=0)
assert_allclose(result0.params, result1.params, rtol=1e-3)
model2 = ConditionalPoisson(y, x, groups=groups)
result2 = model2.fit_regularized(L1_wt=1, alpha=0.2)
# Regression test
assert_allclose(result2.params, np.r_[0, 0, 0.91697508, 0], rtol=1e-4)
# Test with formula
df = pd.DataFrame({
"y": y,
"x1": x[:, 0],
"x2": x[:, 1],
"x3": x[:, 2],
"x4": x[:, 3],
"groups": groups
})
fml = "y ~ 0 + x1 + x2 + x3 + x4"
model3 = ConditionalPoisson.from_formula(fml, groups="groups", data=df)
result3 = model3.fit_regularized(L1_wt=1, alpha=0.2)
assert_allclose(result2.params, result3.params)
def test_lasso_poisson():
np.random.seed(342394)
n = 200
groups = np.arange(10)
groups = np.kron(groups, np.ones(n // 10))
group_effects = np.random.normal(size=10)
group_effects = np.kron(group_effects, np.ones(n // 10))
x = np.random.normal(size=(n, 4))
params = np.r_[0, 0, 1, 0]
lin_pred = np.dot(x, params) + group_effects
mean = np.exp(lin_pred)
y = np.random.poisson(mean)
model0 = ConditionalPoisson(y, x, groups=groups)
result0 = model0.fit()
# Should be the same as model0
model1 = ConditionalPoisson(y, x, groups=groups)
result1 = model1.fit_regularized(L1_wt=0, alpha=0)
assert_allclose(result0.params, result1.params, rtol=1e-3)
model2 = ConditionalPoisson(y, x, groups=groups)
result2 = model2.fit_regularized(L1_wt=1, alpha=0.2)
# Regression test
assert_allclose(result2.params, np.r_[0, 0, 0.91697508, 0], rtol=1e-4)
# Test with formula
df = pd.DataFrame({"y": y, "x1": x[:, 0], "x2": x[:, 1], "x3": x[:, 2],
"x4": x[:, 3], "groups": groups})
fml = "y ~ 0 + x1 + x2 + x3 + x4"
model3 = ConditionalPoisson.from_formula(fml, groups="groups", data=df)
result3 = model3.fit_regularized(L1_wt=1, alpha=0.2)
assert_allclose(result2.params, result3.params)