def test_loss_mse(self):
# =============MSE/MAE============= #
y_pred = tf.constant([[2., 3., 4.], [2., 3., 7.]])
y_pred_2 = tf.constant([[2., 9., 4.], [2., 0., 7.]])
y_true = tf.constant([[2., MAGIC_NUMBER, 4.], [2., MAGIC_NUMBER, 4.]])
npt.assert_almost_equal(mean_absolute_error(y_true, y_pred).numpy(), [0., 3. / 2.])
npt.assert_almost_equal(mean_squared_error(y_true, y_pred).numpy(), [0., 9. / 2])
# make sure neural network prediction won't matter for magic number term
npt.assert_almost_equal(mean_absolute_error(y_true, y_pred).numpy(),
mean_absolute_error(y_true, y_pred_2).numpy())
npt.assert_almost_equal(mean_squared_error(y_true, y_pred).numpy(),
mean_squared_error(y_true, y_pred_2).numpy())
def test_loss_func(self):
# make sure custom reduce_var works
var_array = [1, 2, 3, 4, 5]
self.assertEqual(reduce_var(tf.Variable(var_array)).eval(session=get_session()), np.var(var_array))
# =============Magic correction term============= #
y_true = tf.Variable([[2., MAGIC_NUMBER, MAGIC_NUMBER], [2., MAGIC_NUMBER, 4.]])
npt.assert_array_equal(magic_correction_term(y_true).eval(session=get_session()), [3., 1.5])
# =============MSE/MAE============= #
y_pred = tf.Variable([[2., 3., 4.], [2., 3., 7.]])
y_pred_2 = tf.Variable([[2., 9., 4.], [2., 0., 7.]])
y_true = tf.Variable([[2., MAGIC_NUMBER, 4.], [2., MAGIC_NUMBER, 4.]])
npt.assert_almost_equal(mean_absolute_error(y_true, y_pred).eval(session=get_session()), [0., 3. / 2.])
npt.assert_almost_equal(mean_squared_error(y_true, y_pred).eval(session=get_session()), [0., 9. / 2])
# make sure neural network prediction won't matter for magic number term
npt.assert_almost_equal(mean_absolute_error(y_true, y_pred).eval(session=get_session()),
mean_absolute_error(y_true, y_pred_2).eval(session=get_session()))
npt.assert_almost_equal(mean_squared_error(y_true, y_pred).eval(session=get_session()),
mean_squared_error(y_true, y_pred_2).eval(session=get_session()))
# =============Mean Error============= #
y_pred = tf.Variable([[1., 3., 4.], [2., 3., 7.]])
y_true = tf.Variable([[2., MAGIC_NUMBER, 3.], [2., MAGIC_NUMBER, 7.]])
npt.assert_almost_equal(mean_error(y_true, y_pred).eval(session=get_session()), [0., 0.])
# =============Accuracy============= #
y_pred = tf.Variable([[1., 0., 0.], [1., 0., 0.]])
y_true = tf.Variable([[1., MAGIC_NUMBER, 1.], [0., MAGIC_NUMBER, 1.]])
npt.assert_array_equal(categorical_accuracy(y_true, y_pred).eval(session=get_session()), [1., 0.])
npt.assert_almost_equal(binary_accuracy(from_logits=False)(y_true, y_pred).eval(session=get_session()),
[1. / 2., 0.])
# =============Abs Percentage Accuracy============= #
y_pred = tf.Variable([[1., 0., 0.], [1., 0., 0.]])
y_pred_2 = tf.Variable([[1., 9., 0.], [1., -1., 0.]])
y_true = tf.Variable([[1., MAGIC_NUMBER, 1.], [1., MAGIC_NUMBER, 1.]])
npt.assert_array_almost_equal(mean_absolute_percentage_error(y_true, y_pred).eval(session=get_session()),
[50., 50.], decimal=3)
# make sure neural network prediction won't matter for magic number term
npt.assert_array_almost_equal(mean_absolute_percentage_error(y_true, y_pred).eval(session=get_session()),
mean_absolute_percentage_error(y_true, y_pred_2).eval(session=get_session()),
decimal=3)
# =============Percentage Accuracy============= #
y_pred = tf.Variable([[1., 0., 0.], [1., 0., 0.]])
y_pred_2 = tf.Variable([[1., 9., 0.], [1., -1., 0.]])
y_true = tf.Variable([[1., MAGIC_NUMBER, 1.], [1., MAGIC_NUMBER, 1.]])
npt.assert_array_almost_equal(mean_percentage_error(y_true, y_pred).eval(session=get_session()),
[50., 50.], decimal=3)
# make sure neural network prediction won't matter for magic number term
npt.assert_array_almost_equal(mean_percentage_error(y_true, y_pred).eval(session=get_session()),
mean_percentage_error(y_true, y_pred_2).eval(session=get_session()),
decimal=3)
# =============Mean Squared Log Error============= #
y_pred = tf.Variable([[1., 0., 0.], [1., 0., 0.]])
y_pred_2 = tf.Variable([[1., 9., 0.], [1., -1., 0.]])
y_true = tf.Variable([[1., MAGIC_NUMBER, 1.], [1., MAGIC_NUMBER, 1.]])
npt.assert_array_almost_equal(mean_squared_logarithmic_error(y_true, y_pred).eval(session=get_session()),
[0.24, 0.24], decimal=3)
# make sure neural network prediction won't matter for magic number term
npt.assert_array_almost_equal(mean_squared_logarithmic_error(y_true, y_pred).eval(session=get_session()),
mean_squared_logarithmic_error(y_true, y_pred_2).eval(session=get_session()),
decimal=3)
# =============Zeros Loss============= #
y_pred = tf.Variable([[1., 0., 0.], [5., -9., 2.]])
y_true = tf.Variable([[1., MAGIC_NUMBER, 1.], [1., MAGIC_NUMBER, 1.]])
npt.assert_array_almost_equal(zeros_loss(y_true, y_pred).eval(session=get_session()), [0., 0.])
