def test_sample_weight_init_estimators():
# Smoke test for init estimators with sample weights.
rng = check_random_state(13)
X = rng.rand(100, 2)
sample_weight = np.ones(100)
reg_y = rng.rand(100)
clf_y = rng.randint(0, 2, size=100)
for Loss in LOSS_FUNCTIONS.values():
if Loss is None:
continue
if issubclass(Loss, RegressionLossFunction):
k = 1
y = reg_y
else:
k = 2
y = clf_y
if Loss.is_multi_class:
# skip multiclass
continue
loss = Loss(k)
init_est = loss.init_estimator()
init_est.fit(X, y)
out = loss.get_init_raw_predictions(X, init_est)
assert out.shape == (y.shape[0], 1)
sw_init_est = loss.init_estimator()
sw_init_est.fit(X, y, sample_weight=sample_weight)
sw_out = loss.get_init_raw_predictions(X, sw_init_est)
assert sw_out.shape == (y.shape[0], 1)
# check if predictions match
assert_allclose(out, sw_out, rtol=1e-2)
def test_sample_weight_init_estimators():
# Smoke test for init estimators with sample weights.
rng = check_random_state(13)
X = rng.rand(100, 2)
sample_weight = np.ones(100)
reg_y = rng.rand(100)
clf_y = rng.randint(0, 2, size=100)
for Loss in LOSS_FUNCTIONS.values():
if Loss is None:
continue
if issubclass(Loss, RegressionLossFunction):
k = 1
y = reg_y
else:
k = 2
y = clf_y
if Loss.is_multi_class:
# skip multiclass
continue
loss = Loss(k)
init_est = loss.init_estimator()
init_est.fit(X, y)
out = loss.get_init_raw_predictions(X, init_est)
assert_equal(out.shape, (y.shape[0], 1))
sw_init_est = loss.init_estimator()
sw_init_est.fit(X, y, sample_weight=sample_weight)
sw_out = loss.get_init_raw_predictions(X, sw_init_est)
assert_equal(sw_out.shape, (y.shape[0], 1))
# check if predictions match
assert_allclose(out, sw_out, rtol=1e-2)
def test_sample_weight_deviance():
# Test if deviance supports sample weights.
rng = check_random_state(13)
sample_weight = np.ones(100)
reg_y = rng.rand(100)
clf_y = rng.randint(0, 2, size=100)
mclf_y = rng.randint(0, 3, size=100)
for Loss in LOSS_FUNCTIONS.values():
if Loss is None:
continue
if issubclass(Loss, RegressionLossFunction):
k = 1
y = reg_y
p = reg_y
else:
k = 2
y = clf_y
p = clf_y
if Loss.is_multi_class:
k = 3
y = mclf_y
# one-hot encoding
p = np.zeros((y.shape[0], k), dtype=np.float64)
for i in range(k):
p[:, i] = y == i
loss = Loss(k)
deviance_w_w = loss(y, p, sample_weight)
deviance_wo_w = loss(y, p)
assert deviance_wo_w == deviance_w_w
def test_sample_weight_deviance():
# Test if deviance supports sample weights.
rng = check_random_state(13)
sample_weight = np.ones(100)
reg_y = rng.rand(100)
clf_y = rng.randint(0, 2, size=100)
mclf_y = rng.randint(0, 3, size=100)
for Loss in LOSS_FUNCTIONS.values():
if Loss is None:
continue
if issubclass(Loss, RegressionLossFunction):
k = 1
y = reg_y
p = reg_y
else:
k = 2
y = clf_y
p = clf_y
if Loss.is_multi_class:
k = 3
y = mclf_y
# one-hot encoding
p = np.zeros((y.shape[0], k), dtype=np.float64)
for i in range(k):
p[:, i] = y == i
loss = Loss(k)
deviance_w_w = loss(y, p, sample_weight)
deviance_wo_w = loss(y, p)
assert deviance_wo_w == deviance_w_w