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Adds pinv to tensorflow backend (https://github.com/google/TensorNetwork/issues/844) #935
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mganahl
suggested changes
Sep 7, 2021
| np.testing.assert_allclose(expected, actual) | ||
| expected = tf.linalg.pinv(tensor) | ||
| actual = backend.pinv(tensor) | ||
| np.testing.assert_allclose(expected, actual) |
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add a test that actual @ tensor and tensor @ actual equal the identity (within the desired error)
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Would testing for all the criteria in https://en.wikipedia.org/wiki/Moore%E2%80%93Penrose_inverse be a better test? (As for an example given in tf's documentation, the product wasn't identity)
| @@ -430,3 +430,26 @@ def eps(self, dtype: Type[np.number]) -> float: | |||
| float: Machine epsilon. | |||
| """ | |||
| return tf.experimental.numpy.finfo(dtype).eps | |||
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| def pinv(self, tensor: Tensor, rcond: float = 1E-15, hermitian: bool = False) -> Tensor: | |||
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I think you can remove the hermitian argument
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I had included it as it was an argument for numpy. I'll remove it in the next commit.
Thanks for the review!
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Added pinv to tensorflow_backend.py and corresponding tests to tensorflow_backend_tests,py Issue: #844