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Rerun Latent GP with method="svd" for MvNormals #784

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@michaelosthege michaelosthege commented Apr 13, 2025

Why & How

MvNormal was switched from SVD to Cholesky decomposition by default. This is brittle for many GPs, therefore PyMC > 5.22.0 will defaults Latent GP conditionals to method="svd" (via pymc-devs/pymc#7755).
The example notebook includes manually created MvNormals that also need method="svd" to work.

I also switched from numpyro back to the default sampler, because I couldn't install numpyro on my Windows.

See pymc-devs/pymc#7754.


📚 Documentation preview 📚: https://pymc-examples--784.org.readthedocs.build/en/784/

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MvNormal was switched from SVD to Cholesky decomposition by default.
This is brittle for many GPs, therefore PyMC > 5.22.0 will defaults
Latent GP conditionals to `method="svd"`.
The example notebook includes manually created `MvNormal`s that
also need `method="svd"` to work.

I also switched from numpyro back to the default sampler,
because I couldn't install numpyro on my Windows.

See pymc-devs/pymc#7754.
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