f48c448b72
* Added MeanAbsoluteError and started testing for losses. Added testing for MeanSquaredError and MeanAbsoluteError as well as testing utils. * Formatting fix for docstrings * Switch docstrings to keras_core
124 lines
4.6 KiB
Python
124 lines
4.6 KiB
Python
import numpy as np
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from keras_core import operations as ops
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from keras_core import testing
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from keras_core.losses import losses
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class MeanSquaredErrorTest(testing.TestCase):
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def test_all_correct_unweighted(self):
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mse_obj = losses.MeanSquaredError()
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y_true = np.array([[4, 8, 12], [8, 1, 3]])
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loss = mse_obj(y_true, y_true)
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self.assertAllEqual(loss, 0.0)
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def test_unweighted(self):
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mse_obj = losses.MeanSquaredError()
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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loss = mse_obj(y_true, y_pred)
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self.assertAllEqual(loss, 49.5)
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def test_scalar_weighted(self):
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mse_obj = losses.MeanSquaredError()
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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loss = mse_obj(y_true, y_pred, sample_weight=2.3)
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self.assertAllEqual(loss, 113.85)
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def test_sample_weighted(self):
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mse_obj = losses.MeanSquaredError()
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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sample_weight = np.array([[1.2], [3.4]])
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loss = mse_obj(y_true, y_pred, sample_weight=sample_weight)
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self.assertAllEqual(loss, 767.8 / 6)
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def test_timestep_weighted(self):
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# TODO
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pass
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def test_zero_weighted(self):
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mse_obj = losses.MeanSquaredError()
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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loss = mse_obj(y_true, y_pred, sample_weight=0)
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self.assertAllEqual(loss, 0.0)
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def test_invalid_sample_weight(self):
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# TODO
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pass
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def test_no_reduction(self):
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mse_obj = losses.MeanSquaredError(reduction=None)
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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loss = mse_obj(y_true, y_pred, sample_weight=2.3)
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self.assertAllEqual(loss, [84.3333, 143.3666])
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def test_sum_reduction(self):
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mse_obj = losses.MeanSquaredError(reduction="sum")
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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loss = mse_obj(y_true, y_pred, sample_weight=2.3)
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self.assertAllEqual(loss, 227.69998)
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class MeanAbsoluteErrorTest(testing.TestCase):
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def test_all_correct_unweighted(self):
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mae_obj = losses.MeanAbsoluteError()
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y_true = np.array([[4, 8, 12], [8, 1, 3]])
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loss = mae_obj(y_true, y_true)
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self.assertAllEqual(loss, 0.0)
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def test_unweighted(self):
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mae_obj = losses.MeanAbsoluteError()
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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loss = mae_obj(y_true, y_pred)
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self.assertAllEqual(loss, 5.5)
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def test_scalar_weighted(self):
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mae_obj = losses.MeanAbsoluteError()
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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loss = mae_obj(y_true, y_pred, sample_weight=2.3)
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self.assertAllEqual(loss, 12.65)
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def test_sample_weighted(self):
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mae_obj = losses.MeanAbsoluteError()
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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sample_weight = np.array([[1.2], [3.4]])
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loss = mae_obj(y_true, y_pred, sample_weight=sample_weight)
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self.assertAllEqual(loss, 81.4 / 6)
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def test_timestep_weighted(self):
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# TODO
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pass
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def test_zero_weighted(self):
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mae_obj = losses.MeanAbsoluteError()
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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loss = mae_obj(y_true, y_pred, sample_weight=0)
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self.assertAllEqual(loss, 0.0)
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def test_invalid_sample_weight(self):
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# TODO
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pass
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def test_no_reduction(self):
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mae_obj = losses.MeanAbsoluteError(reduction=None)
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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loss = mae_obj(y_true, y_pred, sample_weight=2.3)
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self.assertAllEqual(loss, [10.7333, 14.5666])
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def test_sum_reduction(self):
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mae_obj = losses.MeanAbsoluteError(reduction="sum")
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y_true = np.array([[1, 9, 2], [-5, -2, 6]])
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y_pred = np.array([[4, 8, 12], [8, 1, 3]], dtype="float32")
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loss = mae_obj(y_true, y_pred, sample_weight=2.3)
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self.assertAllEqual(loss, 25.29999)
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