I’ve had the below model running well with a slightly different problem - recovering the hydraulic conductivity field where the domain is on the surface and observations are made over the entire domain, but for this application - recovering the electrical conductivity field where the domain extends …

It’s a bit difficult to diagnose as we dont know what is the function of reducedOp, but looking at the posterior plot there are a lot of weight concentrated around 0 for sigma. I would start with using a more informative prior, and change HalfCauchy to HalfNormal: tau = pm.HalfNormal('tau', sd=2.5)…

Apparent pathological behavior

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n1ck94 July 27, 2018, 10:35am 5

Ah right, that’s interesting. Is it possible that increasing the amount of chains will help?

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Apparent pathological behavior

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