def testOneDim(self):
random.seed(42)
x = np.random.rand(1000)
y = 2 * x + 3
regressor = learn.TensorFlowLinearRegressor()
regressor.fit(x, y)
score = mean_squared_error(y, regressor.predict(x))
self.assertLess(score, 1.0, "Failed with score = {0}".format(score))
def testBoston(self):
random.seed(42)
boston = datasets.load_boston()
regressor = learn.TensorFlowLinearRegressor(batch_size=boston.data.shape[0],
steps=500,
learning_rate=0.001)
regressor.fit(boston.data, boston.target)
score = mean_squared_error(boston.target, regressor.predict(boston.data))
self.assertLess(score, 150, "Failed with score = {0}".format(score))
def testOneDim(self):
random.seed(42)
x = np.random.rand(1000)
y = 2 * x + 3
feature_columns = learn.infer_real_valued_columns_from_input(x)
regressor = learn.TensorFlowLinearRegressor(feature_columns=feature_columns)
regressor.fit(x, y)
score = mean_squared_error(y, regressor.predict(x))
self.assertLess(score, 1.0, "Failed with score = {0}".format(score))
def testMultiRegression(self):
random.seed(42)
rng = np.random.RandomState(1)
X = np.sort(200 * rng.rand(100, 1) - 100, axis=0)
y = np.array([np.pi * np.sin(X).ravel(), np.pi * np.cos(X).ravel()]).T
regressor = learn.TensorFlowLinearRegressor(learning_rate=0.01)
regressor.fit(X, y)
score = mean_squared_error(regressor.predict(X), y)
self.assertLess(score, 10, "Failed with score = {0}".format(score))
def testMultiRegression(self):
random.seed(42)
rng = np.random.RandomState(1)
x = np.sort(200 * rng.rand(100, 1) - 100, axis=0)
y = np.array([np.pi * np.sin(x).ravel(), np.pi * np.cos(x).ravel()]).T
regressor = learn.TensorFlowLinearRegressor(
feature_columns=learn.infer_real_valued_columns_from_input(x),
learning_rate=0.01,
target_dimension=2)
regressor.fit(x, y)
score = mean_squared_error(regressor.predict(x), y)
self.assertLess(score, 10, "Failed with score = {0}".format(score))
def testLinearRegression(self): rng = np.random.RandomState(67) n = 1000 n_weights = 10 bias = 2 x = rng.uniform(-1, 1, (n, n_weights)) weights = 10 * rng.randn(n_weights) y = np.dot(x, weights) y += rng.randn(len(x)) * 0.05 + rng.normal(bias, 0.01) regressor = learn.TensorFlowLinearRegressor(optimizer="SGD") regressor.fit(x, y, steps=200) # Have to flatten weights since they come in (x, 1) shape. self.assertAllClose(weights, regressor.weights_.flatten(), rtol=0.01)
def testLinearRegression(self):
rng = np.random.RandomState(67)
N = 1000
n_weights = 10
self.bias = 2
self.X = rng.uniform(-1, 1, (N, n_weights))
self.weights = 10 * rng.randn(n_weights)
self.y = np.dot(self.X, self.weights)
self.y += rng.randn(len(self.X)) * 0.05 + rng.normal(self.bias, 0.01)
regressor = learn.TensorFlowLinearRegressor(optimizer="SGD")
regressor.fit(self.X, self.y)
# Have to flatten weights since they come in (X, 1) shape
self.assertAllClose(self.weights,
regressor.weights_.flatten(),
rtol=0.01)
assert abs(self.bias - regressor.bias_) < 0.1
