Split up Bayes Factor stat and plotting functions #2406
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Description
This PR addresses issue #2402.
The
plot_bffunction computes the Bayes Factor statistic, and plots the result. However, it is also useful to just compute the Bayes Factor without making the plot.This PR splits the Bayes Factor computation off to a function
arviz.stats.bayes_factor, which is called byarviz.plots.plot_bfto make the plot.I see that this PR can't be automatically merged, but it's not immediately clear to me why.
Checklist
📚 Documentation preview 📚: https://arviz--2406.org.readthedocs.build/en/2406/