How can we check the accepted samples during the searching process of NUTS?

Questions
1

As the title writes, how can we observe the searching process of PyMC3 at each iteration, not after all the search is finished?

2

By searching process do you mean the tree that NUTS built? That’s not stored due to memory limitation.

3

Maybe I didn’t make the question clear. I mean I want to know the accepted samples of NUTS at each iteration, not after the procedure is finished (after the procedure of NUTS is finished, we can use “_trace” to plot all the accepted samples searched by NUTS).

4

Oh you mean return the sample at each iter? A iterator like sampling process? I am afraid we dont have any accessible API for this - we used to have a live_plot option but it is not very useful and thus removed: https://github.com/pymc-devs/pymc3/commit/fbb864f85e6deb856b6410a1cf35dbccf868c3df

5

OK， thank you very much, I think I have to find another way out.