I tried doing what @junpenglao and @colcarroll pointed to at https://github.com/pymc-devs/pymc3/pull/2975 but I keep getting errors. My model: with pm.Model() as mG: alpha = pm.Normal(...) beta = [...] sigma = [...] mu =[...] Ages = pm.Normal(...) trace_mG = pm.sample…

You do need to reinitialized the model, meaning that you should run the same model code, excluding the pm.sample(...) line.

It appears that no one knows the answer. Should I change the tag to Development?

I am surprised by the error - could you please open an issue on Github with some simple examples?

I can’t reproduce the error, and for some reason now it works fine. I didn’t even restart my computer and did exactly the same thing. Not sure what the problem was; perhaps a bug in my computer. Maybe we should still leave this closed question up here in case this happens to anyone else. Thank you…

Thanks for the reply. @michaelosthege called these kind of bugs Heisenbug which is pretty fitting :joy:

@junpenglao , After I restart my computer and re-open my jupyter notebook, I tried loading the saved trace: with model_1: trace_1 = pm.load_trace(".pymc_1.trace") But it says it doesn’t recognize the model. Do I have to re-run my model? If so, what is save_trace usually used for, considering th…

[image] junpenglao: You do need to reinitialized the model, meaning that you should run the same model code, excluding the pm.sample(...) line. For what it is worth, I have found this to be a good pattern in pymc3 - to separate the modelling step from the sampling step. I even will often defi…

This is a good idea. Separation between model building and inference is a good way to avoid confusion, we should enforce it better in PyMC4.

Hi all, I tried to load my trace as well, but it came with ‘NoneType’ error. I followed what suggested here but no avail. the last several lines of my code looks as follows: with pm.Model() as model: (some indentation) … (some indentation) y_ = gp.marginal_likelihood(‘y’, X=Xs, Xu=Xu, y=…

How to save and load trace

Questions

Gon_F June 7, 2019, 5:08pm 11

You can go through this thread, where I had pretty much the same problem with saving at some point. Tell me if the advice there ends up working for you.

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How to save and load trace

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