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  1. CW: Stan models

    I've been trying to sample from multiple Stan models in parallel, and chains terminate unexpectedly every single time.

    I tried all kinds of workarounds without any success, and eventually found the following bug report:

    github.com/stan-dev/cmdstan/is

    Containers seemed like overkill; then I discovered `unname` and found that it worked! What a relief. I still have no idea *why* this is necessary ...

    #StanMCMC #cmdstan #cmdstanr

  2. CmdStan 2.33.0!

    This new release brings two new exciting features:
    - a new Stan language type - tuples
    - a new VI algorithm - Pathfinder.

    The release also features some new functions - mostly related to tuples, and other minor improvements.

    There are also a number of long-deprecated language features that have now become errors with this version.

    For details, see the blog post: blog.mc-stan.org/2023/09/05/re

    #Bayesian #mcmc #pathfinder #CmdStan