def testBijector(self):
"""Do a basic sanity check of forward, inverse, jacobian."""
expected_x = np.random.randn(4, 3, 2)
expected_y = np.reshape(expected_x, [4, 6])
with self.cached_session() as sess:
shape_in, shape_out, feed_dict = self.build_shapes([3, 2], [6,])
bijector = Reshape(
event_shape_out=shape_out,
event_shape_in=shape_in,
validate_args=True)
(x_,
y_,
fldj_,
ildj_) = sess.run((
bijector.inverse(expected_y),
bijector.forward(expected_x),
bijector.forward_log_det_jacobian(expected_x, event_ndims=2),
bijector.inverse_log_det_jacobian(expected_y, event_ndims=2),
), feed_dict=feed_dict)
self.assertEqual("reshape", bijector.name)
self.assertAllClose(expected_y, y_, rtol=1e-6, atol=0)
self.assertAllClose(expected_x, x_, rtol=1e-6, atol=0)
self.assertAllClose(0., fldj_, rtol=1e-6, atol=0)
self.assertAllClose(0., ildj_, rtol=1e-6, atol=0)
def testBijector(self):
"""Do a basic sanity check of forward, inverse, jacobian."""
expected_x = np.random.randn(4, 3, 2)
expected_y = np.reshape(expected_x, [4, 6])
with self.test_session() as sess:
shape_in, shape_out, feed_dict = self.build_shapes([3, 2], [6,])
bijector = Reshape(
event_shape_out=shape_out,
event_shape_in=shape_in,
validate_args=True)
(x_,
y_,
fldj_,
ildj_) = sess.run((
bijector.inverse(expected_y),
bijector.forward(expected_x),
bijector.forward_log_det_jacobian(expected_x),
bijector.inverse_log_det_jacobian(expected_y),
), feed_dict=feed_dict)
self.assertEqual("reshape", bijector.name)
self.assertAllClose(expected_y, y_, rtol=1e-6, atol=0)
self.assertAllClose(expected_x, x_, rtol=1e-6, atol=0)
self.assertAllClose(0., fldj_, rtol=1e-6, atol=0)
self.assertAllClose(0., ildj_, rtol=1e-6, atol=0)
def testRaisesOpError(self):
x1 = np.random.randn(4, 2, 3)
x2 = np.random.randn(4, 3, 2)
x3 = np.random.randn(4, 5, 1, 1)
with self.test_session() as sess:
shape_in_ph = array_ops.placeholder(shape=[
2,
],
dtype=dtypes.int32)
shape_out_ph = array_ops.placeholder(shape=[
3,
],
dtype=dtypes.int32)
bijector = Reshape(event_shape_out=shape_out_ph,
event_shape_in=shape_in_ph,
validate_args=True)
with self.assertRaisesOpError(
"Input `event_shape` does not match `event_shape_in`."):
sess.run(bijector.forward(x2),
feed_dict={
shape_out_ph: [1, 6, 1],
shape_in_ph: [2, 3]
})
with self.assertRaisesOpError(
"event_shape_out entries must be positive."):
sess.run(bijector.forward(x1),
feed_dict={
shape_out_ph: [-1, -1, 6],
shape_in_ph: [2, 3]
})
# test that *all* methods check basic assertions
fd_mismatched = {shape_out_ph: [1, 1, 5], shape_in_ph: [2, 3]}
with self.assertRaisesOpError(
"Input/output `event_size`s do not match."):
sess.run(bijector.forward(x1), feed_dict=fd_mismatched)
with self.assertRaisesOpError(
"Input/output `event_size`s do not match."):
sess.run(bijector.inverse(x3), feed_dict=fd_mismatched)
with self.assertRaisesOpError(
"Input/output `event_size`s do not match."):
sess.run(bijector.inverse_log_det_jacobian(x3),
feed_dict=fd_mismatched)
with self.assertRaisesOpError(
"Input/output `event_size`s do not match."):
sess.run(bijector.forward_log_det_jacobian(x1),
feed_dict=fd_mismatched)