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Fix bug in slogdet and expose it in linalg module #807

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Merged
merged 2 commits into from
Jun 6, 2024
Merged

Fix bug in slogdet and expose it in linalg module #807

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81e0ea8
Refactor np.linalg.slogdet to use np.array instead of z.astype for dt…
theorashid Jun 6, 2024
c45485f
add a test on the breaking case for slogdet types
theorashid Jun 6, 2024
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3 changes: 2 additions & 1 deletion pytensor/tensor/nlinalg.py
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Original file line number Diff line number Diff line change
Expand Up @@ -246,7 +246,7 @@ def perform(self, node, inputs, outputs):
(x,) = inputs
(sign, det) = outputs
try:
sign[0], det[0] = (z.astype(x.dtype) for z in np.linalg.slogdet(x))
sign[0], det[0] = (np.array(z, dtype=x.dtype) for z in np.linalg.slogdet(x))
except Exception:
print("Failed to compute determinant", x)
raise
Expand Down Expand Up @@ -1186,6 +1186,7 @@ def kron(a, b):
"lstsq",
"matrix_power",
"norm",
"slogdet",
"tensorinv",
"tensorsolve",
"kron",
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5 changes: 5 additions & 0 deletions tests/tensor/test_nlinalg.py
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Expand Up @@ -387,6 +387,11 @@ def test_slogdet():
sign, det = np.linalg.slogdet(r)
assert np.equal(sign, f_sign)
assert np.allclose(det, f_det)
# check numpy array types is returned
# see https://github.com/pymc-devs/pytensor/issues/799
sign, logdet = slogdet(x)
det = sign * pytensor.tensor.exp(logdet)
assert_array_almost_equal(det.eval({x: [[1]]}), np.array(1.0))


def test_trace():
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