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I've been using Stan for a bit through Pystan and is really nice. Just recently however I tried to reduce the size of the output (particularly, the generated_quantities bit) using the same syntax than in STAN, by declaring save_warmup=False. However, when digging a bit into PyStan code I noticed that this is currently hard coded and not able to edit using the control argument (the dictionary that handles extra parameters in Pystan). I'm tempted to modify the source code directly, but just wondering if is something PyStan devs are currently considering.

Cheers and thanks for an amazing work! (both PyStan and Stan!)

Alvaro Flores
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  • Interesting question! There is a slot for `save_warmup` in `cdef struct sampling_t` in stan_fit.pxd, although it says there that it is always true, which is so if one looks at the Python side. On top, in `get_ctrl_sampling_save_warmup`, used in the caller, one finds it is also hardcoded to true. Why? Does anything break if different? – carlosayam Jun 02 '20 at 13:23

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