I am looking at a place where I’m getting a bad initial energy, and I have found the term (thanks to everyone for the trick of looking at the BasicRVs). There’s a node (InverseGamma, the variance of a population that I observe), that has what looks like a normal value as observation (it’s about 0.5…

Ah, I see that I can answer my own question. The function I needed was theano.printing.pprint() as in: In : theano.printing.pprint(model['sigma_Input00 replicate 0'].distribution.alpha) Out[21]: '(((TensorConstant{2} * (hyper_sigma_mu_Input00 * hyper_sigma_mu_Input00)) + (ViewOp(exp(hyper_sigma_si…

Thanks. I poked around painfully and found… a hyper-parameter for σ that was a Normal instead of a TruncatedNormal, yielding occasionally a negative value and causing the error. Here’s a follow-up question: I have done this often enough that I’d love a crutch to help me avoid the same mistake. Is…

Well, we have some check but for parameter domain but they dont work on tensors, so yeah not great. In general, unless we have type check it seems a bit difficult to cover all use case (e.g., parameter being output from some function), but we should definitively improve this - suggestion welcome!

Trying to diagnose a `-inf` initial energy error: theano problem

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junpenglao February 14, 2019, 7:08am 3

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Trying to diagnose a `-inf` initial energy error: theano problem

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