def test_sklearn_multitask_regression_overfit(self):
"""Test SKLearn singletask-to-multitask overfits tiny regression data."""
n_tasks = 2
tasks = ["task%d" % task for task in range(n_tasks)]
n_samples = 10
n_features = 3
# Generate dummy dataset
np.random.seed(123)
ids = np.arange(n_samples)
X = np.random.rand(n_samples, n_features)
y = np.random.rand(n_samples, n_tasks)
w = np.ones((n_samples, n_tasks))
dataset = DiskDataset.from_numpy(self.train_dir, X, y, w, ids)
verbosity = "high"
regression_metric = Metric(metrics.r2_score, verbosity=verbosity, task_averager=np.mean)
def model_builder(model_dir):
sklearn_model = RandomForestRegressor()
return SklearnModel(sklearn_model, model_dir)
model = SingletaskToMultitask(tasks, model_builder, self.model_dir)
# Fit trained model
model.fit(dataset)
model.save()
# Eval model on train
transformers = []
evaluator = Evaluator(model, dataset, transformers, verbosity=verbosity)
scores = evaluator.compute_model_performance([regression_metric])
assert scores[regression_metric.name] > .7
def test_sklearn_multitask_classification_overfit(self):
"""Test SKLearn singletask-to-multitask overfits tiny data."""
n_tasks = 10
tasks = ["task%d" % task for task in range(n_tasks)]
task_types = {task: "classification" for task in tasks}
n_samples = 10
n_features = 3
# Generate dummy dataset
np.random.seed(123)
ids = np.arange(n_samples)
X = np.random.rand(n_samples, n_features)
y = np.random.randint(2, size=(n_samples, n_tasks))
w = np.ones((n_samples, n_tasks))
dataset = Dataset.from_numpy(self.train_dir, X, y, w, ids, tasks)
model_params = {
"batch_size": None,
"data_shape": dataset.get_data_shape()
}
verbosity = "high"
classification_metric = Metric(metrics.roc_auc_score,
verbosity=verbosity)
def model_builder(tasks,
task_types,
model_params,
model_dir,
verbosity=None):
return SklearnModel(tasks,
task_types,
model_params,
model_dir,
mode="classification",
model_instance=RandomForestClassifier(),
verbosity=verbosity)
model = SingletaskToMultitask(tasks,
task_types,
model_params,
self.model_dir,
model_builder,
verbosity=verbosity)
# Fit trained model
model.fit(dataset)
model.save()
# Eval model on train
transformers = []
evaluator = Evaluator(model,
dataset,
transformers,
verbosity=verbosity)
scores = evaluator.compute_model_performance([classification_metric])
assert scores[classification_metric.name] > .9
def test_singletask_to_multitask_classification(self):
splittype = "scaffold"
compound_featurizers = [CircularFingerprint(size=1024)]
complex_featurizers = []
output_transformers = []
tasks = ["task0", "task1", "task2", "task3", "task4", "task5", "task6",
"task7", "task8", "task9", "task10", "task11", "task12",
"task13", "task14", "task15", "task16"]
task_types = {task: "classification" for task in tasks}
input_file = "multitask_example.csv"
n_features = 10
n_tasks = len(tasks)
# Define train dataset
n_train = 100
X_train = np.random.rand(n_train, n_features)
y_train = np.random.randint(2, size=(n_train, n_tasks))
w_train = np.ones_like(y_train)
ids_train = ["C"] * n_train
train_dataset = Dataset.from_numpy(self.train_dir,
X_train, y_train, w_train, ids_train,
tasks)
# Define test dataset
n_test = 10
X_test = np.random.rand(n_test, n_features)
y_test = np.random.randint(2, size=(n_test, n_tasks))
w_test = np.ones_like(y_test)
ids_test = ["C"] * n_test
test_dataset = Dataset.from_numpy(self.test_dir,
X_test, y_test, w_test, ids_test,
tasks)
params_dict = {
"batch_size": 32,
"data_shape": train_dataset.get_data_shape()
}
classification_metrics = [Metric(metrics.roc_auc_score)]
def model_builder(tasks, task_types, model_params, model_builder, verbosity=None):
return SklearnModel(tasks, task_types, model_params, model_builder,
model_instance=LogisticRegression())
multitask_model = SingletaskToMultitask(tasks, task_types, params_dict,
self.model_dir, model_builder)
# Fit trained model
multitask_model.fit(train_dataset)
multitask_model.save()
# Eval multitask_model on train
evaluator = Evaluator(multitask_model, train_dataset, output_transformers,
verbosity=True)
_ = evaluator.compute_model_performance(classification_metrics)
# Eval multitask_model on test
evaluator = Evaluator(multitask_model, test_dataset, output_transformers,
verbosity=True)
_ = evaluator.compute_model_performance(classification_metrics)
def test_sklearn_multitask_classification(self):
"""Test that sklearn models can learn on simple multitask classification."""
np.random.seed(123)
n_tasks = 4
dataset = sklearn.datasets.load_digits(n_class=2)
X, y = dataset.data, dataset.target
y = np.reshape(y, (len(y), 1))
y = np.hstack([y] * n_tasks)
frac_train = .7
n_samples = len(X)
X_train, y_train = X[:frac_train*n_samples], y[:frac_train*n_samples]
X_test, y_test = X[frac_train*n_samples:], y[frac_train*n_samples:]
train_dataset = Dataset.from_numpy(self.train_dir, X_train, y_train)
test_dataset = Dataset.from_numpy(self.test_dir, X_test, y_test)
tasks = train_dataset.get_task_names()
task_types = {task: "classification" for task in tasks}
model_params = {
"batch_size": None,
"data_shape": train_dataset.get_data_shape()
}
verbosity = "high"
classification_metric = Metric(metrics.roc_auc_score, verbosity=verbosity)
def model_builder(tasks, task_types, model_params, model_dir, verbosity=None):
return SklearnModel(tasks, task_types, model_params, model_dir,
mode="classification",
model_instance=LogisticRegression(),
verbosity=verbosity)
model = SingletaskToMultitask(tasks, task_types, model_params, self.model_dir,
model_builder, verbosity=verbosity)
# Fit trained model
model.fit(train_dataset)
model.save()
# Eval model on train
transformers = []
train_evaluator = Evaluator(model, train_dataset, transformers, verbosity=verbosity)
train_scores = train_evaluator.compute_model_performance([classification_metric])
print("train_scores")
print(train_scores)
# Eval model on test
transformers = []
evaluator = Evaluator(model, test_dataset, transformers, verbosity=verbosity)
scores = evaluator.compute_model_performance([classification_metric])
print("scores")
print(scores)
for score in scores[classification_metric.name]:
assert score > .5
def test_sklearn_multitask_classification(self):
"""Test that sklearn models can learn on simple multitask classification."""
np.random.seed(123)
n_tasks = 4
tasks = range(n_tasks)
dataset = sklearn.datasets.load_digits(n_class=2)
X, y = dataset.data, dataset.target
y = np.reshape(y, (len(y), 1))
y = np.hstack([y] * n_tasks)
frac_train = .7
n_samples = len(X)
n_train = int(frac_train * n_samples)
X_train, y_train = X[:n_train], y[:n_train]
X_test, y_test = X[n_train:], y[n_train:]
train_dataset = DiskDataset.from_numpy(self.train_dir, X_train,
y_train)
test_dataset = DiskDataset.from_numpy(self.test_dir, X_test, y_test)
verbosity = "high"
classification_metric = Metric(metrics.roc_auc_score,
verbosity=verbosity)
def model_builder(model_dir):
sklearn_model = LogisticRegression()
return SklearnModel(sklearn_model, model_dir)
model = SingletaskToMultitask(tasks, model_builder, self.model_dir)
# Fit trained model
model.fit(train_dataset)
model.save()
# Eval model on train
transformers = []
train_evaluator = Evaluator(model,
train_dataset,
transformers,
verbosity=verbosity)
train_scores = train_evaluator.compute_model_performance(
[classification_metric])
# Eval model on test
transformers = []
evaluator = Evaluator(model,
test_dataset,
transformers,
verbosity=verbosity)
scores = evaluator.compute_model_performance([classification_metric])
for score in scores[classification_metric.name]:
assert score > .5
def test_singletask_to_multitask_classification(self):
n_features = 10
n_tasks = 17
tasks = range(n_tasks)
# Define train dataset
n_train = 100
X_train = np.random.rand(n_train, n_features)
y_train = np.random.randint(2, size=(n_train, n_tasks))
w_train = np.ones_like(y_train)
ids_train = ["C"] * n_train
train_dataset = DiskDataset.from_numpy(self.train_dir, X_train,
y_train, w_train, ids_train)
# Define test dataset
n_test = 10
X_test = np.random.rand(n_test, n_features)
y_test = np.random.randint(2, size=(n_test, n_tasks))
w_test = np.ones_like(y_test)
ids_test = ["C"] * n_test
test_dataset = DiskDataset.from_numpy(self.test_dir, X_test, y_test,
w_test, ids_test)
transformers = []
classification_metrics = [Metric(metrics.roc_auc_score)]
def model_builder(model_dir):
sklearn_model = LogisticRegression()
return SklearnModel(sklearn_model, model_dir)
multitask_model = SingletaskToMultitask(tasks, model_builder,
self.model_dir)
# Fit trained model
multitask_model.fit(train_dataset)
multitask_model.save()
# Eval multitask_model on train
evaluator = Evaluator(multitask_model,
train_dataset,
transformers,
verbosity=True)
_ = evaluator.compute_model_performance(classification_metrics)
# Eval multitask_model on test
evaluator = Evaluator(multitask_model,
test_dataset,
transformers,
verbosity=True)
_ = evaluator.compute_model_performance(classification_metrics)
def test_sklearn_multitask_regression_overfit(self):
"""Test SKLearn singletask-to-multitask overfits tiny regression data."""
n_tasks = 2
tasks = ["task%d" % task for task in range(n_tasks)]
task_types = {task: "regression" for task in tasks}
n_samples = 10
n_features = 3
# Generate dummy dataset
np.random.seed(123)
ids = np.arange(n_samples)
X = np.random.rand(n_samples, n_features)
y = np.random.rand(n_samples, n_tasks)
w = np.ones((n_samples, n_tasks))
dataset = Dataset.from_numpy(self.train_dir, X, y, w, ids, tasks)
model_params = {
"batch_size": None,
"data_shape": dataset.get_data_shape()
}
verbosity = "high"
regression_metric = Metric(metrics.r2_score, verbosity=verbosity)
def model_builder(tasks, task_types, model_params, model_dir, verbosity=None):
return SklearnModel(tasks, task_types, model_params, model_dir,
mode="regression",
model_instance=RandomForestRegressor(),
verbosity=verbosity)
model = SingletaskToMultitask(tasks, task_types, model_params, self.model_dir,
model_builder, verbosity=verbosity)
# Fit trained model
model.fit(dataset)
model.save()
# Eval model on train
transformers = []
evaluator = Evaluator(model, dataset, transformers, verbosity=verbosity)
scores = evaluator.compute_model_performance([regression_metric])
assert scores[regression_metric.name] > .7
print("About to perform train/valid/test split.")
splitter = RandomSplitter(verbosity=verbosity)
print("Performing new split.")
train_dataset, valid_dataset, test_dataset = splitter.train_valid_test_split(
nci_dataset, train_dir, valid_dir, test_dir)
classification_metric = Metric(metrics.roc_auc_score, np.mean,
verbosity=verbosity,
mode="classification")
def model_builder(model_dir):
sklearn_model = RandomForestRegressor(n_estimators=500)
return SklearnModel(sklearn_model, model_dir)
model = SingletaskToMultitask(nci_tasks, model_builder, model_dir)
# Fit trained model
model.fit(train_dataset)
model.save()
train_evaluator = Evaluator(model, train_dataset, transformers, verbosity=verbosity)
train_scores = train_evaluator.compute_model_performance([classification_metric])
print("Train scores")
print(train_scores)
valid_evaluator = Evaluator(model, valid_dataset, transformers, verbosity=verbosity)
valid_scores = valid_evaluator.compute_model_performance([classification_metric])
print("Validation scores")
print(valid_scores)
model_params,
model_dir,
model_instance=RandomForestClassifier(
class_weight="balanced", n_estimators=500),
verbosity=verbosity)
model = SingletaskToMultitask(tox21_tasks,
tox21_task_types,
params_dict,
model_dir,
model_builder,
verbosity=verbosity)
# Fit trained model
model.fit(train_dataset)
model.save()
train_evaluator = Evaluator(model,
train_dataset,
transformers,
verbosity=verbosity)
train_scores = train_evaluator.compute_model_performance(
[classification_metric])
print("Train scores")
print(train_scores)
valid_evaluator = Evaluator(model,
valid_dataset,
transformers,
def test_sklearn_multitask_classification(self):
"""Test that sklearn models can learn on simple multitask classification."""
np.random.seed(123)
n_tasks = 4
dataset = sklearn.datasets.load_digits(n_class=2)
X, y = dataset.data, dataset.target
y = np.reshape(y, (len(y), 1))
y = np.hstack([y] * n_tasks)
frac_train = .7
n_samples = len(X)
X_train, y_train = X[:frac_train * n_samples], y[:frac_train *
n_samples]
X_test, y_test = X[frac_train * n_samples:], y[frac_train * n_samples:]
train_dataset = Dataset.from_numpy(self.train_dir, X_train, y_train)
test_dataset = Dataset.from_numpy(self.test_dir, X_test, y_test)
tasks = train_dataset.get_task_names()
task_types = {task: "classification" for task in tasks}
model_params = {
"batch_size": None,
"data_shape": train_dataset.get_data_shape()
}
verbosity = "high"
classification_metric = Metric(metrics.roc_auc_score,
verbosity=verbosity)
def model_builder(tasks,
task_types,
model_params,
model_dir,
verbosity=None):
return SklearnModel(tasks,
task_types,
model_params,
model_dir,
mode="classification",
model_instance=LogisticRegression(),
verbosity=verbosity)
model = SingletaskToMultitask(tasks,
task_types,
model_params,
self.model_dir,
model_builder,
verbosity=verbosity)
# Fit trained model
model.fit(train_dataset)
model.save()
# Eval model on train
transformers = []
train_evaluator = Evaluator(model,
train_dataset,
transformers,
verbosity=verbosity)
train_scores = train_evaluator.compute_model_performance(
[classification_metric])
print("train_scores")
print(train_scores)
# Eval model on test
transformers = []
evaluator = Evaluator(model,
test_dataset,
transformers,
verbosity=verbosity)
scores = evaluator.compute_model_performance([classification_metric])
print("scores")
print(scores)
for score in scores[classification_metric.name]:
assert score > .5
def test_singletask_to_multitask_classification(self):
splittype = "scaffold"
compound_featurizers = [CircularFingerprint(size=1024)]
complex_featurizers = []
output_transformers = []
tasks = [
"task0", "task1", "task2", "task3", "task4", "task5", "task6",
"task7", "task8", "task9", "task10", "task11", "task12", "task13",
"task14", "task15", "task16"
]
task_types = {task: "classification" for task in tasks}
input_file = "multitask_example.csv"
n_features = 10
n_tasks = len(tasks)
# Define train dataset
n_train = 100
X_train = np.random.rand(n_train, n_features)
y_train = np.random.randint(2, size=(n_train, n_tasks))
w_train = np.ones_like(y_train)
ids_train = ["C"] * n_train
train_dataset = Dataset.from_numpy(self.train_dir, X_train, y_train,
w_train, ids_train, tasks)
# Define test dataset
n_test = 10
X_test = np.random.rand(n_test, n_features)
y_test = np.random.randint(2, size=(n_test, n_tasks))
w_test = np.ones_like(y_test)
ids_test = ["C"] * n_test
test_dataset = Dataset.from_numpy(self.test_dir, X_test, y_test,
w_test, ids_test, tasks)
params_dict = {
"batch_size": 32,
"data_shape": train_dataset.get_data_shape()
}
classification_metrics = [Metric(metrics.roc_auc_score)]
def model_builder(tasks,
task_types,
model_params,
model_builder,
verbosity=None):
return SklearnModel(tasks,
task_types,
model_params,
model_builder,
model_instance=LogisticRegression())
multitask_model = SingletaskToMultitask(tasks, task_types, params_dict,
self.model_dir, model_builder)
# Fit trained model
multitask_model.fit(train_dataset)
multitask_model.save()
# Eval multitask_model on train
evaluator = Evaluator(multitask_model,
train_dataset,
output_transformers,
verbosity=True)
_ = evaluator.compute_model_performance(classification_metrics)
# Eval multitask_model on test
evaluator = Evaluator(multitask_model,
test_dataset,
output_transformers,
verbosity=True)
_ = evaluator.compute_model_performance(classification_metrics)
tox_test), tox_transformers = dc.molnet.load_tox21()
classification_metric = Metric(
metrics.roc_auc_score, np.mean, mode="classification")
def model_builder(model_dir):
sklearn_model = RandomForestClassifier(
class_weight="balanced", n_estimators=500, n_jobs=-1)
return dc.models.SklearnModel(sklearn_model, model_dir)
print(tox_train.get_task_names())
print(tox_tasks)
tox_model = SingletaskToMultitask(tox_tasks, model_builder)
tox_model.fit(tox_train)
# Load sider models now
sider_tasks, (
sider_train, sider_valid,
sider_test), sider_transformers = dc.molnet.load_sider(split="random")
sider_model = SingletaskToMultitask(sider_tasks, model_builder)
sider_model.fit(sider_train)
# Load sweetlead dataset now. Pass in dataset object and appropriate
# transformers to predict functions
sweet_tasks, (sweet_dataset, _, _), sweet_transformers = dc.molnet.load_sweet()