def test_penalties(nps_app_inst: ArrayApplication):
num_samples, num_features = 1000, 10
real_X, real_y = BimodalGaussian.get_dataset(num_samples, num_features)
X = nps_app_inst.array(real_X, block_shape=(100, 3))
y = nps_app_inst.array(real_y, block_shape=(100,))
param_set = [
{"solver": "gd", "lr": 1e-6, "tol": 1e-8, "max_iter": 10},
{"solver": "sgd", "lr": 1e-6, "tol": 1e-8, "max_iter": 10},
{"solver": "block_sgd", "lr": 1e-6, "tol": 1e-8, "max_iter": 10},
{"solver": "newton", "tol": 1e-8, "max_iter": 10},
{"solver": "lbfgs", "tol": 1e-8, "max_iter": 20},
]
for kwargs in param_set:
model: Lasso = Lasso(alpha=0.5, **kwargs)
model.fit(X, y)
if kwargs["solver"] in ("newton", "lbfgs"):
assert model.deviance_sqr(X, y) > 0.9
model: Ridge = Ridge(alpha=0.5, **kwargs)
model.fit(X, y)
if kwargs["solver"] in ("newton", "lbfgs"):
assert model.deviance_sqr(X, y) > 0.9
model: ElasticNet = ElasticNet(alpha=0.5, l1_ratio=0.5, **kwargs)
model.fit(X, y)
if kwargs["solver"] in ("newton", "lbfgs"):
assert model.deviance_sqr(X, y) > 0.9
def test_logistic(nps_app_inst: ArrayApplication):
num_samples, num_features = 1000, 10
real_X, real_y = BimodalGaussian.get_dataset(num_samples, num_features)
X = nps_app_inst.array(real_X, block_shape=(100, 3))
y = nps_app_inst.array(real_y, block_shape=(100,))
param_set = [
{"solver": "gd", "lr": 1e-6, "tol": 1e-8, "max_iter": 10},
{"solver": "sgd", "lr": 1e-6, "tol": 1e-8, "max_iter": 10},
{"solver": "block_sgd", "lr": 1e-6, "tol": 1e-8, "max_iter": 10},
{"solver": "newton", "tol": 1e-8, "max_iter": 10},
{"solver": "irls", "tol": 1e-8, "max_iter": 10},
]
for kwargs in param_set:
runtime = time.time()
lr_model: LogisticRegression = LogisticRegression(**kwargs)
lr_model.fit(X, y)
runtime = time.time() - runtime
y_pred = lr_model.predict(X).get()
y_pred_proba = lr_model.predict_proba(X).get()
np.allclose(
np.ones(shape=(y.shape[0],)), y_pred_proba[:, 0] + y_pred_proba[:, 1]
)
print("opt", kwargs["solver"])
print("runtime", runtime)
print("norm", lr_model.grad_norm_sq(X, y).get())
print("objective", lr_model.objective(X, y).get())
print("accuracy", np.sum(y.get() == y_pred) / num_samples)
def test_sklearn_logistic_regression(nps_app_inst: ArrayApplication):
from sklearn.linear_model import LogisticRegression as SKLogisticRegression
num_samples, num_features = 1000, 10
real_X, real_y = BimodalGaussian.get_dataset(num_samples, num_features)
X = nps_app_inst.array(real_X, block_shape=(100, 3))
y = nps_app_inst.array(real_y, block_shape=(100,))
param_set = [
{"solver": "newton-cg", "tol": 1e-8, "max_iter": 10},
]
for kwargs in param_set:
runtime = time.time()
lr_model: LogisticRegression = LogisticRegression(**kwargs)
lr_model.fit(X, y)
runtime = time.time() - runtime
y_pred = lr_model.predict(X).get()
y_pred_proba = lr_model.predict_proba(X).get()
np.allclose(
np.ones(shape=(y.shape[0],)), y_pred_proba[:, 0] + y_pred_proba[:, 1]
)
sk_lr_model = SKLogisticRegression(**kwargs)
sk_lr_model.fit(real_X, real_y)
sk_y_pred = sk_lr_model.predict(real_X)
sk_y_pred_proba = sk_lr_model.predict_proba(real_X)
np.allclose(
np.ones(shape=(y.shape[0],)), sk_y_pred_proba[:, 0] + sk_y_pred_proba[:, 1]
)
np.allclose(sk_y_pred, y_pred)
def test_lr(nps_app_inst: ArrayApplication):
num_samples, num_features = 1000, 10
rs = np.random.RandomState(1337)
real_theta = rs.random_sample(num_features)
real_X, real_y = BimodalGaussian.get_dataset(233, num_features, theta=real_theta)
X = nps_app_inst.array(real_X, block_shape=(100, 3))
y = nps_app_inst.array(real_y, block_shape=(100,))
param_set = [
{"solver": "gd", "lr": 1e-6, "tol": 1e-8, "max_iter": 100},
{"solver": "newton", "tol": 1e-8, "max_iter": 10},
]
for kwargs in param_set:
runtime = time.time()
model: LinearRegression = LinearRegression(**kwargs)
model.fit(X, y)
assert model._beta.shape == real_theta.shape and model._beta0.shape == ()
runtime = time.time() - runtime
y_pred = model.predict(X).get()
print("opt", kwargs["solver"])
print("runtime", runtime)
print("norm", model.grad_norm_sq(X, y).get())
print("objective", model.objective(X, y).get())
print("error", np.sum((y.get() - y_pred) ** 2) / num_samples)
print("D^2", model.deviance_sqr(X, y).get())
# Test if integer array arguments will converge properly.
X = nps_app_inst.array([[1, 2], [3, 5], [1, 5]], block_shape=(2, 2))
y = nps_app_inst.array([1, 2, 3], block_shape=(2,))
model: LinearRegression = LinearRegression()
model.fit(X, y)
try:
pred = model.predict([1, 2]).get()
assert 0.9 < pred < 1.1
except OverflowError:
assert False, "LinearRegression overflows with integer array arguments."
def test_pca(app_inst: ArrayApplication):
real_X, _ = BimodalGaussian.get_dataset(2345, 9)
X = app_inst.array(real_X, block_shape=(123, 4))
# Covariance matrix test.
C = app_inst.cov(X, rowvar=False)
V, _, VT = linalg.svd(app_inst, C)
assert app_inst.allclose(V, VT.T)
pc = X @ V
assert app_inst.allclose(pc, linalg.pca(app_inst, X))
def test_concatenate(app_inst: ArrayApplication):
axis = 1
real_X, _ = BimodalGaussian.get_dataset(1000, 9)
real_ones = np.ones(shape=(1000, 1))
X = app_inst.array(real_X, block_shape=(100, 9))
ones = app_inst.ones((1000, 1), (100, 1), dtype=X.dtype)
X_concated = app_inst.concatenate([X, ones], axis=axis, axis_block_size=X.block_shape[axis])
real_X_concated = np.concatenate([real_X, real_ones], axis=axis)
assert np.allclose(X_concated.get(), real_X_concated)
real_X2 = np.random.random_sample(1000*17).reshape(1000, 17)
X2 = app_inst.array(real_X2, block_shape=(X.block_shape[0], 3))
X_concated = app_inst.concatenate([X, ones, X2], axis=axis, axis_block_size=X.block_shape[axis])
real_X_concated = np.concatenate([real_X, real_ones, real_X2], axis=axis)
assert np.allclose(X_concated.get(), real_X_concated)
def test_sklearn_linear_regression(nps_app_inst: ArrayApplication):
from sklearn.linear_model import LinearRegression as SKLinearRegression
_, num_features = 1000, 10
rs = np.random.RandomState(1337)
real_theta = rs.random_sample(num_features)
real_X, real_y = BimodalGaussian.get_dataset(233, num_features, theta=real_theta)
X = nps_app_inst.array(real_X, block_shape=(100, 3))
y = nps_app_inst.array(real_y, block_shape=(100,))
param_set = [
{"solver": "newton-cg", "tol": 1e-8, "max_iter": 10},
]
for kwargs in param_set:
lr_model: LinearRegression = LinearRegression(**kwargs)
lr_model.fit(X, y)
y_pred = lr_model.predict(X).get()
sk_lr_model = SKLinearRegression()
sk_lr_model.fit(real_X, real_y)
sk_y_pred = sk_lr_model.predict(real_X)
np.allclose(sk_y_pred, y_pred)
def test_lr(nps_app_inst: ArrayApplication):
num_samples, num_features = 1000, 10
rs = np.random.RandomState(1337)
real_theta = rs.random_sample(num_features)
real_X, real_y = BimodalGaussian.get_dataset(233, num_features, theta=real_theta)
X = nps_app_inst.array(real_X, block_shape=(100, 3))
y = nps_app_inst.array(real_y, block_shape=(100,))
param_set = [
{"solver": "gd", "lr": 1e-6, "tol": 1e-8, "max_iter": 100},
{"solver": "newton", "tol": 1e-8, "max_iter": 10},
]
for kwargs in param_set:
runtime = time.time()
model: LinearRegression = LinearRegression(**kwargs)
model.fit(X, y)
assert model._beta.shape == real_theta.shape and model._beta0.shape == ()
runtime = time.time() - runtime
y_pred = model.predict(X).get()
print("opt", kwargs["solver"])
print("runtime", runtime)
print("norm", model.grad_norm_sq(X, y).get())
print("objective", model.objective(X, y).get())
print("error", np.sum((y.get() - y_pred) ** 2) / num_samples)
print("D^2", model.deviance_sqr(X, y).get())
def test_logistic(app_inst: ArrayApplication):
num_samples, num_features = 1000, 10
real_X, real_y = BimodalGaussian.get_dataset(num_samples, num_features)
X = app_inst.array(real_X, block_shape=(100, 3))
y = app_inst.array(real_y, block_shape=(100, ))
opt_param_set = [("gd", {
"lr": 1e-6,
"tol": 1e-8,
"max_iter": 10
}), ("block_sync_sgd", {
"lr": 1e-6,
"tol": 1e-8,
"max_iter": 10
}), ("block_async_sgd", {
"lr": 1e-6,
"tol": 1e-8,
"max_iter": 10
}), ("newton", {
"tol": 1e-8,
"max_iter": 10
}), ("irls", {
"tol": 1e-8,
"max_iter": 10
})]
for opt, opt_params in opt_param_set:
runtime = time.time()
lr_model: LogisticRegression = LogisticRegression(
app_inst, opt, opt_params)
lr_model.fit(X, y)
runtime = time.time() - runtime
y_pred = (lr_model.predict(X).get() > 0.5).astype(int)
print("opt", opt)
print("runtime", runtime)
print("norm", lr_model.grad_norm_sq(X, y).get())
print("objective", lr_model.objective(X, y).get())
print("accuracy", np.sum(y.get() == y_pred) / num_samples)
def test_logistic_cv(nps_app_inst: ArrayApplication):
num_samples, num_features = 1000, 10
num_bad = 100
block_shape = (200, 10)
folds = num_samples // block_shape[0]
rs = np.random.RandomState(1337)
real_X, real_y = BimodalGaussian.get_dataset(
num_samples - num_bad, num_features, p=0.5
)
extra_X, extra_y = BimodalGaussian.get_dataset(num_bad, num_features, p=0.5)
# Perturb some examples.
extra_X = extra_X * rs.random_sample(np.product(extra_X.shape)).reshape(
extra_X.shape
)
extra_y = rs.randint(0, 2, extra_y.shape).reshape(extra_y.shape)
perm = rs.permutation(np.arange(num_samples))
real_X = np.concatenate([real_X, extra_X], axis=0)[perm]
real_y = np.concatenate([real_y, extra_y], axis=0)[perm]
# real_X, real_y = BimodalGaussian.get_dataset(num_samples, num_features)
X = nps_app_inst.array(real_X, block_shape=block_shape)
y = nps_app_inst.array(real_y, block_shape=(block_shape[0],))
param_set = [
{"solver": "newton", "tol": 1e-8, "max_iter": 10},
{
"solver": "newton",
"penalty": "l2",
"C": 1.0 / 0.1,
"tol": 1e-8,
"max_iter": 10,
},
{
"solver": "newton",
"penalty": "l2",
"C": 1.0 / 0.2,
"tol": 1e-8,
"max_iter": 10,
},
{
"solver": "newton",
"penalty": "l2",
"C": 1.0 / 0.4,
"tol": 1e-8,
"max_iter": 10,
},
{
"solver": "newton",
"penalty": "l2",
"C": 1.0 / 0.8,
"tol": 1e-8,
"max_iter": 10,
},
]
X_train = nps_app_inst.empty(
(num_samples - X.block_shape[0], num_features), X.block_shape, X.dtype
)
y_train = nps_app_inst.empty(
(num_samples - y.block_shape[0],), y.block_shape, y.dtype
)
num_hps = len(param_set)
mean_accuracies = nps_app_inst.empty((num_hps,), (num_hps,))
for i, kwargs in enumerate(param_set):
accuracies = nps_app_inst.empty((folds,), (folds,))
for fold in range(folds):
print(i, fold)
pos = X.block_shape[0] * fold
block_size, _ = X.grid.get_block_shape((fold, 0))
start = pos
stop = pos + block_size
X_train[:start] = X[:start]
X_train[start:] = X[stop:]
y_train[:start] = y[:start]
y_train[start:] = y[stop:]
X_test, y_test = X[start:stop], y[start:stop]
lr_model: LogisticRegression = LogisticRegression(**kwargs)
lr_model.fit(X_train, y_train)
y_pred = lr_model.predict(X_test)
accuracies[fold] = nps_app_inst.sum(y_test == y_pred) / (stop - start)
mean_accuracies[i] = nps_app_inst.mean(accuracies)
print(mean_accuracies.get())
def test_svd(app_inst: ArrayApplication):
real_X, _ = BimodalGaussian.get_dataset(2345, 9)
X = app_inst.array(real_X, block_shape=(123, 4))
U, S, VT = app_inst.svd(X)
assert np.allclose((U.get() * S.get()) @ VT.get(), real_X)
def test_matmul(app_inst: ArrayApplication):
real_X, _ = BimodalGaussian.get_dataset(100, 9)
X = app_inst.array(real_X, block_shape=(100, 1))
X_sqr = X.T @ X
assert np.allclose(X_sqr.get(), real_X.T @ real_X)
def test_log(app_inst: ArrayApplication):
real_X, _ = BimodalGaussian.get_dataset(100, 9)
X = app_inst.array(real_X, block_shape=(10, 2))
assert np.allclose(app_inst.log(X).get(), np.log(real_X))
def test_reshape(app_inst: ArrayApplication):
real_X, _ = BimodalGaussian.get_dataset(1000, 9)
X = app_inst.array(real_X, block_shape=(100, 9))
X = X.reshape(shape=(1000, 9), block_shape=(1000, 1))
assert np.allclose(X.get(), real_X)