Hello, the following code produces an error: with pm.Model() as model: mu = pm.LogNormal('mu',mu=1,sigma=1,shape=(2,2)) var = pm.InverseGamma('var',alpha=1,beta=1,shape=2) cov = pm.Beta('cov',alpha=1,beta=1) cov_matrix = pm.math.stack([var[0],cov,cov, var[1]]).reshape((2,2)) …

[image] HughKinnear: The error: I don’t see the error locally. Sampling took ~1 minute for me, although there are divergences (my guess is that the LogNormal mu prior is a bit at odds with negative observed values). Are you using the last version of PyMC? If you are not, can you try updating…

Positive Distributions as mu Causing Value Error in MvNormal

Questions v5

ricardoV94 January 11, 2024, 10:27am 4

We have fixed some similar-sounding bugs recently, so I think it was just that.

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Positive Distributions as mu Causing Value Error in MvNormal

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