def testWithFeatureColumns(self):
head_fn = head_lib._multi_class_head_with_softmax_cross_entropy_loss(
n_classes=3,
loss_reduction=losses.Reduction.SUM_OVER_NONZERO_WEIGHTS)
hparams = tensor_forest.ForestHParams(num_trees=3,
max_nodes=1000,
num_classes=3,
num_features=4,
split_after_samples=20,
inference_tree_paths=True)
est = random_forest.CoreTensorForestEstimator(
hparams.fill(),
head=head_fn,
feature_columns=[core_feature_column.numeric_column('x')])
iris = base.load_iris()
data = {'x': iris.data.astype(np.float32)}
labels = iris.target.astype(np.int32)
input_fn = numpy_io.numpy_input_fn(x=data,
y=labels,
batch_size=150,
num_epochs=None,
shuffle=False)
est.train(input_fn=input_fn, steps=100)
res = est.evaluate(input_fn=input_fn, steps=1)
self.assertEqual(1.0, res['accuracy'])
self.assertAllClose(0.55144483, res['loss'])
def testIrisDNN(self):
iris = base.load_iris()
feature_columns = [feature_column.real_valued_column("", dimension=4)]
classifier = dnn.DNNClassifier(
feature_columns=feature_columns,
hidden_units=[10, 20, 10],
n_classes=3,
config=run_config.RunConfig(tf_random_seed=1))
classifier.fit(iris.data, iris.target, max_steps=200)
variable_names = classifier.get_variable_names()
self.assertEqual(
classifier.get_variable_value("dnn/hiddenlayer_0/weights").shape,
(4, 10))
self.assertEqual(
classifier.get_variable_value("dnn/hiddenlayer_1/weights").shape,
(10, 20))
self.assertEqual(
classifier.get_variable_value("dnn/hiddenlayer_2/weights").shape,
(20, 10))
self.assertEqual(
classifier.get_variable_value("dnn/logits/weights").shape, (10, 3))
self.assertIn("dnn/hiddenlayer_0/biases", variable_names)
self.assertIn("dnn/hiddenlayer_1/biases", variable_names)
self.assertIn("dnn/hiddenlayer_2/biases", variable_names)
self.assertIn("dnn/logits/biases", variable_names)
def testAdditionalOutputs(self):
"""Tests multi-class classification using matrix data as input."""
hparams = tensor_forest.ForestHParams(num_trees=1,
max_nodes=100,
num_classes=3,
num_features=4,
split_after_samples=20,
inference_tree_paths=True)
classifier = random_forest.CoreTensorForestEstimator(
hparams.fill(), keys_column='keys', include_all_in_serving=True)
iris = base.load_iris()
data = iris.data.astype(np.float32)
labels = iris.target.astype(np.int32)
input_fn = numpy_io.numpy_input_fn(x={
'x':
data,
'keys':
np.arange(len(iris.data)).reshape(150, 1)
},
y=labels,
batch_size=10,
num_epochs=1,
shuffle=False)
classifier.train(input_fn=input_fn, steps=100)
predictions = list(classifier.predict(input_fn=input_fn))
# Check that there is a key column, tree paths and var.
for pred in predictions:
self.assertTrue('keys' in pred)
self.assertTrue('tree_paths' in pred)
self.assertTrue('prediction_variance' in pred)
def _iris_data_input_fn(): # Converts iris data to a logistic regression problem. iris = base.load_iris() ids = np.where((iris.target == 0) | (iris.target == 1)) features = constant_op.constant(iris.data[ids], dtype=dtypes.float32) labels = constant_op.constant(iris.target[ids], dtype=dtypes.float32) labels = array_ops.reshape(labels, labels.get_shape().concatenate(1)) return features, labels
def _input_fn():
iris = base.load_iris()
return {
'feature': constant_op.constant(iris.data,
dtype=dtypes.float32)
}, constant_op.constant(iris.target,
shape=[150],
dtype=dtypes.int32)
def testMultiClass_NpMatrixData(self):
"""Tests multi-class classification using numpy matrix data as input."""
iris = base.load_iris()
train_x = iris.data
train_y = iris.target
classifier = debug.DebugClassifier(n_classes=3)
classifier.fit(x=train_x, y=train_y, steps=200)
scores = classifier.evaluate(x=train_x, y=train_y, steps=1)
self._assertInRange(0.0, 1.0, scores['accuracy'])
def testDNNDropout0(self):
# Dropout prob == 0.
iris = base.load_iris()
feature_columns = [feature_column.real_valued_column("", dimension=4)]
classifier = dnn.DNNClassifier(
feature_columns=feature_columns,
hidden_units=[10, 20, 10],
n_classes=3,
dropout=0.0,
config=run_config.RunConfig(tf_random_seed=1))
classifier.fit(iris.data, iris.target, max_steps=200)
def _get_classification_input_fns():
iris = base.load_iris()
data = iris.data.astype(np.float32)
labels = iris.target.astype(np.int32)
train_input_fn = numpy_io.numpy_input_fn(x=data,
y=labels,
batch_size=150,
num_epochs=None,
shuffle=False)
predict_input_fn = numpy_io.numpy_input_fn(x=data[:1, ],
y=None,
batch_size=1,
num_epochs=1,
shuffle=False)
return train_input_fn, predict_input_fn
def iris_input_multiclass_fn():
iris = base.load_iris()
return {
'feature': constant_op.constant(iris.data, dtype=dtypes.float32)
}, constant_op.constant(iris.target, shape=(150, 1), dtype=dtypes.int32)
def prepare_iris_data_for_logistic_regression():
# Converts iris data to a logistic regression problem.
iris = base.load_iris()
ids = np.where((iris.target == 0) | (iris.target == 1))
return base.Dataset(data=iris.data[ids], target=iris.target[ids])
